Liquid vs. Bar in Dr. Bronner’s Castile Soap

Liquid vs. Bar

The liquid came first – Peppermint to be exact. Bar soap meandered in a few decades later. While there are hardliners in both camps, the difference between liquid and bar is mostly a matter of personal preference. However, there are some differences between the two.

Liquid vs. Bar

Here are the ingredients side by side for the Baby Unscented Pure-Castile Soap. I chose our simplest soap, which lacks any essential oils, so that the differences are easier to see.

Differences explained

  • Liquid contains more water.
    • Why: There is just enough water in the liquid soaps to keep them liquid. Any less water and the soap begins to solidify. To test this, leave the cap off your bottle for a day, and you’ll notice the soap’s starting to gel. You can reliquify it with a bit of water. (The thickness, or thinness, of the soap is not due to high water content, but to the consistency of the various oils.)
    • Effect on Performance: None
  • Liquid uses potassium hydroxide to saponify oils; bar uses sodium hydroxide.
    • Why: Hardness – sodium hydroxide produces a harder soap than potassium hydroxide. The purpose of these strong alkalis is to blast apart the oil molecules, separating the glycerin from the fatty acids. The fatty acids then reattach to the sodium or potassium ion, leaving the glycerin and water (hydroxide) free-floating. (Just a sidenote – soap cannot be made any other way. None of these alkalis are left in the soap. Check out the link at the bottom about soapmaking.)
    • Effect on Performance: None
  • Liquid contains palm kernel oil; bar contains palm oil.
    • Why: Saponified palm oil solidifies into a harder bar soap than palm kernel oil is able to.
    • Effect on Performance: Bar soap is slightly more moisturizing. Palm oil contains stearic acid, which some people find to be less drying than the lauric acid found in palm kernel oil.
  • Bar contains salt (NaCl – sodium chloride or table salt).
    • Why: Also serves as a hardener.
    • Effect on Performance: Bar soap is slightly more moisturizing. Since our bodies are slightly salty, salt water is gentler on our skin than pure water. Salty soap is, too.

Other differences in formulation

  • How the hemp seed and jojoba oils are added:
    • In the liquid soaps, the hemp seed and jojoba oils are saponified, i.e. turned into soap, along with the coconut and olive oils. However, in the bar soaps, these two oils are added unaltered after the saponification process. This is called “superfatting” the soaps. A while back my brothers tried superfatting the liquids with the hemp seed and jojoba oils, but found that the oils separated out and floated to the top.
    • Effect on performance: Bar soaps produce a creamier lather and are slightly more moisturizing.
  • Amount of essential oils:
    • This is only relevant to the scented soaps (everything except the Baby Unscented). The liquid soap have a higher percentage of the essential oils than do the bar soaps. Once again, the issue at stake is hardness. The bar soaps would soften with that high a concentration of the essential oils.
    • Effect on performance: This is entirely a matter of personal preference. Those who like an intense whiff of scent, and those who are looking for the specific benefits of the particular essential oils, should opt for the liquids. Those who like a little scent, but not too much, the bar soap would be better.

Differences in usage

For all body applications, they are entirely interchangeable – from washing face, hair, or body, or shaving. For around the house purposes, you would need to take the extra step of dissolving the bar soaps in water before using them in a spray bottle solution, but they are equally effective. Also, the bar soap can be grated to achieve a kind of powdered soap for laundry, although the liquid works just as well.

Volume of actual soap

I don’t know how to de-math this, but people who put together their own recipes for cleaners might want to know this. Bar soaps are 5% water; liquids are 61%. The chemistry is a little different for both, but considering that a bar of soap weighs 5 oz, and thus 4.75 oz of it is soap, you would need 12.18 ounces (a little over 1 ½ c.) of liquid soap to equal the soap content of a 5 oz bar. Doing the math the other way, 1 cup of liquid soap equals approximately 2/3 of a bar (or 3.64 oz.) of Dr. B’s bar soap.

Bottom line

The Dr. Bronner’s Pure-Castile Bar and Pure-Castile Liquid Soaps are interchangeable. However, the bars are slightly more moisturizing. The liquids are slightly more scented.

If you want more info on the process of soapmaking, check out this article, Making the Best Soap. And here’s a video tour of our Liquid Soap Production Factory.

If you have any other questions about what is in the soap and why or where it is sourced and why or anything else, let me know!

Wondering how to use the Pure-Castile Liquid & Bar Soaps for personal care and house care? You may find these blog posts helpful.

Download Now!

Castile Soap Cheat Sheet

Dilute! Dilute! OK! But how much? Print this guide!


Download Now!

Bar Soap Cheat Sheet

Bar Soap aficonados, this one's for you!


Leave a Reply to Iruoma Ginly Cancel reply

Your email address will not be published. Required fields are marked *

Angie says:

Hi – may I ask what is the difference between Pure castile liquid soap and organic pump soap?

Laura says:

Hi Lisa, I’m just started using your Baby Bar Soap on my hair and love it with a Apple Cider Vinegar rinse. My only concern is the palm oil? There seems to be a lot of concern about the over harvesting of palm in the rainforests. How do you address this with your priorities of earth friendly products? Love the soap…hope there is a way to get palm oil in an ethical way….

Looking forward to your answer 🙂 Thanks for all your great products…my home is completely Bronner-ized! 🙂

Lisa Bronner says:

Hi Laura – Thanks for asking! You give me a chance to bring up our awesome sourcing of palm oil from Ghana. Because of the issues of deforestation, habitat loss, and generally unsustainable farming practices in the conventional sourcing of palm oil, we set up our own Fair Trade operation in Ghana called Serendipalm. You can read more about it and watch a couple of great short documentaries about it on our website: There is no clear-cutting of the rainforest or habitat loss to primates. Farmers are trained in restorative soil techniques and the community benefits as well through our Fair Trade fund which has provided bed nets for the community as well as built a maternity ward on a local hospital. Really great stuff! Check it out and let me know your thoughts.

Ron Newman says:

I have a small travel bottle of Dr Bronners peppermint soap that has turned from a liquid into a gel that I cannot get out of the bottle. How can I turn it back into a liquid again?
By the way I started using Dr Bronners in 1971 and have turned numerous friends and family into Dr Bronners fanatics like myself.

Lisa Bronner says:

Hi Ron – It’s a gel because some of the water content has evaporated. Just add a bit of water and let it sit for a couple hours. Then give it a shake and you should be good to go.

jesse says:

Thanks for your reply, Lisa. I had also ascribed some importance to the *order* of ingredients listed—assuming the habit of listing items in order by volume or amount, as it were. Peppermint oil notably wavers in importance. And I know from discussions elsewhere that hemp oil replaced…was it “caramel coloring”? I recall the zing I got from Dr. Bronner’s when I first started using it in the 70s. (I’m an admitted peppermint fanatic.) And the zing evolved over the years. But my bottles remain in use—in two bathrooms, two sinks, two showers. (And one mini in a medicine chest for traveling.)

Lisa Bronner says:

In my grandfather’s day, before labeling guidelines – or at least before he started adhering to them – the listed order may or may not have corresponded with volume/weight. He might have just put them on in order of importance to him and to the recipe. More recently (like the past 20 or so years) the ingredients are listed by weight. Hemp oil didn’t replace anything, but was added to supplement the jojoba oil in mimicking the skins natural oils. The caramel color (which my grandfather never listed) was simply removed as an unnecessary ingredient. He added it because people associated light colored soap with diluted soap, and many people who have used our soaps through the decade have similarly thought we’ve diluted the soap because it is now much lighter. The soap content has remained the same, though. The peppermint oil has bounced around the list because we use it along with the mentha arvensis to achieve that iconic “zinginess”, but the exact volume does change through the batches because nature changes. Peppermint is a crop that varies greatly depending on environmental factors – rainfall, heat, humidity – so that a crop of peppermint from the exact same field produces a different aroma in its oils from year to year. It keeps us hopping, trying to get that zing in every batch, which is why we add the mentha arvensis. It’s kind of funny how often we’re sniffing peppemint oil from each batch getting the blend just right!

That’s probably more than you wanted to know, but I think the history and the processes are really interesting! Thanks for bringing it up!

Jesse says:

I’ve saved and re-used Dr. Bronner’s bottles over my many years of use. It’s fun to see how the recipe has evolved. Leaving off water first, I’ve seen (I think in this order):

– potassium solution, cocunut-olive-jojoba-peppermint oils
– saponified coconut-hemp oils (with retained glycerin), olive fatty acids, peppermint oil (with boosted menthol), vitamin E and citric acid
– saponified organic coconut and organic olive oils (w/retained glycerine), organic hemp oil, organic jojoba oil, mentha arvensis, organic peppermint oil, citric acid, vitamin E
– organic coconut oil, potassium hydroxide, organic olive oil, mentha arvensis, organic fair trade hemp oil, organic jojoba oil, organic peppermint oil, cetric acid, tocopherol

I may have missed a few. Bottles last a long time. I guess I agree with Guilderstern: “…old ways are the best ways.”

Lisa Bronner says:

Hi Jesse – It’s neat to see the different phrasing through the years. The recipe is actually the same, but the labeling requirements (due to our organic and Fair Trade certifications) have changed causing different phrasing. “Potassium solution” refers to sodium hydroxide which is what saponifies the oils. At one time, the ingredients needed to be what is in the final product: saponified coconut-hemp oils (with retained glycerin)” and nowadays, we need to list what went into the product initially, separately listing the oils from the hydroxide. Tocopherol is vitamin E. I’ve never taken note of the evolution of the list through the years. Thanks for sharing!

Marion Roaman says:

Hi, I LOVE your products, especially the bar soaps. As you are well aware, the use of Citric Acid can be a bit controversial. What do you have to say about this? I ask not because I am questioning your product, only because I am curious. Thanks so much! Marion

Lisa Bronner says:

Hi Marion – Thanks for the love! I appreciate your coming to us with your question about citric acid. True soap is naturally alkaline. It is impossible to make a true soap (i.e.not a detergent parading under the name “body wash/gel/scrub/cleanser” etc.) that is not alkaline. After each batch we make, we test the pH and if it is higher than 8.9, we add just enough citric acid to bring it down. The citric acid that we add reacts with any sodium or potassium hydroxide (essential to soapmaking) that may be left unreacted with the soap. Afterwards there is neither citric acid nor any of the hydroxides left in the soap.

Please let me know if I can elaborate further!

Allison says:


Can I use the all one hemp lavender soap bar in my Castile soap dish soap receipe? I use 1-1/2 cups of water with 1/2 cup of Castile soap and about 1 tbp of the bar. Thanks!!

Kristy says:

Wow, I was so excited when I finally found a product that I could use without worrying about added detergents and harsh chemicals but now I will no longer be using your product because even though it is natural and contains no harsh chemicals. It is destroying the planet. The use of Palm Oil in your product shows that you would rather choose profit over the Environment and countless number of species destroyed everyday because of the use of Palm Oil. It is extremely disappointing. I hope you reevaluate what kind of company you are and make better decision on the ingredients you put in your products. I will be spreading the word on what your product contains and the destruction is has on our planet and fellow species that share this planet with us.

Albo says:

Wow, Kristy. I didn’t know until I read your comment and then researched. Thanks for the enlightenment.

Lisa Bronner says:

Hi Albo – I’d be interested to hear your thoughts when you’ve checked out the links I share with Kristy. I’m very glad you’re looking into this important issue.

All the best,

Albo says:

Hi, Lisa. One place (among many) I looked was Dive Damai, which in turn yielded a link to the Union of Concerned Scientists. There, I found, “While purchasing certified sustainable palm oil is a good first step, it does not address all the negative environmental impacts associated with the production of palm oil.” However, with my usual due diligence I’ll keep reading. I care. Many sites (including UCS) allow for *both* sides of the story. And as an old fogey, I have plenty of time to read, decide, and pass on the garnered result.

Lisa Bronner says:

Hi Kristy – I am so glad you brought this up. There has certainly been horrible devastation done to our planet and its species in the name of palm oil cultivation. This is unacceptable to us at Dr. Bronner’s and so we went on a search for a sustainable, Fair Trade, non-destructive source for palm oil. Ultimately, we founded a company called Serendipalm in Ghana. This operation is beautifully demonstrating how palm oil can be produced without the awful side effects seen in the Malaysian and Indonesian productions. Please check out our articles, and more importantly, our videos on our website under the Ethical Sourcing tab: And please do spread the word about this. There is a better way.

All the best,

Albo says:

I wear dentures. I brush gums, not teeth. I brush dentures separately. What do you perceive as the advantage to me (if any) of peppermint toothpaste over a drop or two of peppermint soap on a toothbrush? As far as I can tell, the taste seems pretty similar. And neither whitens my gums, of course 😉

bria younger says:

Which bar is better tea tree bar or tea tree liquid an should I add water to the liquid one because the oils are way stronger

Lisa Bronner says:

If you’re needing the effects of tea tree oil, such as on acne or eczema, I recommend the tea tree liquid. Just use a couple drops for a face washing. Or mix some up in a foaming pump – 1 part soap to 3 parts water, or even more water. See what works best for you.

Melanie Roberts says:

Where do I find Chloride-free, ph- neutral liquid soap for a dispenser?

Natural Homemade Laundry Detergent Question and Answer - Bren Did says:

[…] liquid Castile soap is more expensive than using Castille bars. According to Lisa Bronner, 1 cup of liquid Castile soap equals approximately 3.64 ounces of bar soap. This means you need 35 […]

g frank nin says:

Not a comment but a question, does this soap work with saltwater? I’m looking for a soap that I can use while salt water boating for personal hygiene.


Hulda says:

Is Dr. Bronner’s liquid castille soap unrefined? Organic is not enough. IMO refined cancels out at least some of the organicness of an oil. See Paul Pitchford’s Healing With Whole Foods.

monica maya says:

Hi, i add some eo to castile soap and it has separation. I wonder which procedure cause the separation. Is the type of eo, or the type of bottle (i used pp bottle to store the castile) , or becauce it’s already cured? Some says that we need to put eo before curing time. Is it true? Thanks so much.

Gus Morgan says:

I added a teaspoon of liquid coconut oil to a foam soap dispenser and not only did it separate but it clogged my dispenser. I need to run clean, hot water through it to get the oil out so i don’t recommend adding oil to a foaming dispenser; it might working a regular soap dispenser but I haven’t tried it.

Wendy says:

This is for Tiffany who asked how to make liquid soap from dr. Bronners bar soap. Put it in a large ziplock bag with a cup r two of water – I use distilled – then close the bag tight and let it sit. It should take about five days to become soft and squishy but that depends on how warm it is. Mine took about 8 days because t has been cool here. Every day I would squeeze it around to help it along and had to add more water after a couple of days. When it is all “melted you just add water until it is the consistency you want for what you are doing. Mine is thick like partially set jello and I will use it in place of the fels naptha soap -which I cannot buy where I live- when I make laundry soap. To make hand soap I dilute it to a thin liquid and add a bit of oil ( your choice) then put it in a foam dispenser. If the bar you use is unscented you can also add several drops of essential oil to your liking. I hope this helps you Tiffany.

Jamal says:

Hi Lisa!
I love this Dr.Bronners, and the forms of it, esp. the peppermint one. But i have a question. I bought yesterday a liquid from of peppermint liquid soap, 473ml. However today when i washed my body with it, it came a bit of water into the bottle, so i just wonder will it still have the same affect afterwards??

Mary says:

Love all your products.
Can you please advise if Dr Bronner’s liquid pure Castile soap be used in my HE washer?
Many thanks

Diana Donofrio says:

these ingredients are not “poisonous” but soap, in general, can cause gastric upset and diarrhea if consumed. I don’t use the liquid soap for floors and counters because it needs to be rinsed more than Sal Suds. I have two cats and two dogs and I use diluted Sal Suds for most cleaning tasks such as mopping floors (the floor in my house is 100% tile), counter top cleaning and I use it in my Rubbermaid spray mop for spot cleaning pet accidents on the floor. I don’t leave it in puddles on the floor but I also don’t worry about it being 100% dry and my cats walk over the damp floor on occasion and I have not seen any issues and I have been doing this since they were 2 lb kittens. IMO, these products are much safer for pets than commercial cleaners.

mina says:

Hello, I would like to ask some questions that I have concerns about glycerin, sodium hydroxide, potassium hydroxide, that contains in castile soaps, are they safe for cats if I use in the house for cleaning, washing purposes ?. can my cat lick on it ? . Please let me know. Thank you. Minhtrinh

Jeanine says:

I have switched to using just solid soaps to avoid plastic. Disposable plastic is creating a HUGE problem for our oceans and the environment in general (second only to climate change). Palm oil is also an issue because of deforestation and the large amounts of methane released when the forest is cleared for the palm oil plantations. I wish and hope that Dr. Bronner’s will take this issues into account sometime soon. It would be lovely to see their liquid soaps in a different kind of package.

Deb Stasse says:

I recently found your website and love it! Been using Dr Bronner’s off and on mostly on, since late 1960’s! I am so grateful for your comparisons of liquid to bar soap as I have been making laundry soap with liquid soap and most the recipes are for bar. Also, I really appreciate the information about soap vs detergent. I switched to SalSuds for cleaning. The hardest part for me is to use LITTLE enough!
Are you still answering comments? I haven’t seen any answers dated since April 28, 2014.
Best wishes, Deb

Suzanne says:

I noticed several diy body wash recipes using Dr. B. liquid castile soap. I was thinking of just trying to add a Bath and Body Works oil in a scent that I like to the soap. How would I dilute the soap and would I need to add anything else to use as a shower gel? I have never used liquid castile soap or tried making my own shower gel, but I would like to give it a try! Thanks

Kathy says:

What’s the reason of forming more foam with liquid soap more than with the bar soap?

Kim Wills says:

I want to use the same laundry soap recipe I already have, but I don’t know how much liquid castile soap to use instead of the bar soap..CURRENT RECIPE 1/2 c. washing soda, 1/2 c. borax, 1/3 bar Fels Naptha bar soap,1 gallon +16 c. water. Can you please advise?

Jeanine says:

I really like your soaps, but I am increasingly concerned with plastic pollution and want to avoid plastic packaging at all costs. Would you know the best way of converting your soap bars to liquid? It would be great if, sometime in the future, you could think of some system to reduce plastic waste (refills perhaps?). Thanks!

sam says:

so I have been on no-poo for 60 days.
I have washed with egg, green tea, coffee, yoghurt. nothing works amazingly. still trying here!
so my no-poo is basically, I can use anything on my hair which is natural.
The hydroxide. is the only worry to me, but there is none left by the time the product is made? is this the ‘lye’?
would you say I am safe to use your soaps as shampoo without breaking my 60 days!

ZG says:

Have you tried washing your hair with baking soda? and rinse with apple cider vinegar (1 Tbsp/cup water).
It’s the only no-poo thing that worked for me. Shampoo are giving me terrible allergies of the skin. Any where my hair touches my skin … rash! (I’m guessing product residue). No poo– no rash…so far.
I tried the Dr. Bronners Bar soap on my hair and it worked alright…the liquid didn’t work. I guess that’s due to the formula difference. Good Luck

Jeanine says:

My scalp used to itch ALL the time. I tried a million things including no-poo but nothing helped until I switched to JR Liggets bar shampoo (the one for dry hair). My hair has NEVER been better and my scalp has stopped itching for the first time in over 25 years. Plus, no plastic! I tried Dr. Bronner’s on my hair once, but I find their products too drying so I use them for household purposes only.

Karen says:

Good morning. I am stuck with about ten loads of laundry to do, and the only soap I have is for the body, though I have Tea Tree, baby, and almond . I thought I still had Sal Suds but apparently not. Can I use any of these in the washer? Thx.

Andrea says:

I have a recipe for laundry soap and it calls for a bar of fels-naptha dissolved into 4 cups of water. How would I substiute liquid dr. Bronners soap into this recipe? Thank you for any help.

Cindy says:

I have a question! I prefer the bar soap, however all of the different recipes I have call for a certain amount of liquid. I can’t use the liquid in these recipes, because it makes me itch (even the baby mild!)….. I am hoping that you can help me figure out how to dilute the bar soap with water (or however it should be done) so that I can use it in place of the liquid called for in all of the recipes….. Thank you so much!

The Magical World of Castile Soap | Back to Your Roots Wellness says:

[…] same thing, only the ingredients are morphed just a tad to allow the soap to solidify. Here is a link on where to read more about the differences of liquid and bar soap written by Lisa Bronner. I want […]

Tiffany Goh says:

Hi, I am interested in knowing how can we turn the bar soap into liquid soap. It is insanely expensive to buy Dr Bronner here in Singapore. 2 FL OZ actually cost S$4.90!

Sara says:

I amused to using a moisturizer after washing my face but now that I am switching to this all natural remedy, I don’t want to use my formal moisturizer. I have acne prone skin, any suggestions?

Ted says:


I love your various blog topics. They are so informative.

I am starting to recycle laundry water – I just set up a passive system and recycled my first load to water my plants. Perhaps later I will also reuse shower water. I want to reduce the amount of salt and other chemicals that I add to the soil. I am researching the best cleaners to use on laundry, house, and personal cleaning. How much salt is in Sal Suds and Castile bar soap?

With grey water re-use in mind, how should I use Sal Suds or Liquid Castile for laundry? Borax is a no no for plant re-use so I won’t be using that. I suppose I also have to think about the pH of the grey water, don’t you think? It all seems to get so complicated when the water doesn’t disappear down a hole.

And what about your hair rinse? Chemical composition. Grey water re-use friendly?

Thanks so much.

JD Mumma says:

I too would like to read a response about the soap being involved in grey water systems.

Jester says:

It’s too bad that neither is Castille soap as: “Castile Soap or as it’s originally named in Spain Jabón de Castilla, is made exclusively with unrefined Extra Virgin Olive Oil. Unfortunately, pseudo called Castile Soaps that contain little or non Olive Oil in their formulations are widely available in today’s market. If it’s not made with 100% Olive Oil is NOT TRUE Castile Soap.”

I see your bars in Trader Joes, shake my head and laugh as I walk away. Please stop calling this Castille Soap. Your ingredients are great but know what you are labeling first please.

Zach says:


I’ve read all the above and no one has really mentioned a much more serious matter (for those who have it) but my acne prone skin on my face.. struggled since i was 18 and I’m 23 now and it really stinks to see people eat crap day and night and never clean them selves or there bed sheets and there face is perfectly fine. but I’m over here like what the hell is life.. lol… 🙁 ANYWAYS what is the best to use for my face?? I’ve used every stupid lying product on the market and did all the prescription stuff and all that is a lie and the government just wants my money and they get the doctors to lie. i tried the tea tree bar soap for a bit and it sort of worked a bit i guess but i think maybe my schedule of face washing might be the problem. a year ago i started washing my face and body at night with warm hot water then just rinsing off in cold water in the morning. seeing as washing my face with chemicals in the morning causes much more irritation in the skin since the sun is out. but i recently switch to the liquid version tea tree and its kind of made it worse. but it could just be getting used to it i suppose but once again i know there has to be a better schedule to use this stuff on my face like with certain water temperatures or times of the day and following up on it etc. i know these are questions for a “dermatologist” but that is bull crap I’m sorry I’ve been to a few and they all say different things so to me there all full of crap. 🙁 wish big brother scientist governments would just release to the people the real cure for acne cause they obviously have it. but anyway sorry for kind of ranting i would appreciate your reply.. thank you much and i greatly appreciate it.

Lisa trepanier says:

Zack, different Lisa here, something to check into for any type rash is a gluten sensitivity. But, a person will experience a detox rash as the gluten leaves your body. Keep in mind that you cannot just eat less gluten, the whole system is thrown off with even a tiny bit of gluten. The other thing is sugar. I will have facial eruptions with anything other than natural sugar, even coconut sugar, or too much juice, because of the concentration factor. I can use maple syrup. Not fun, but you will be healthier! Lisa t

Glory says:

You could look into Shea butter- it totally transformed my skin

Renee says:

I had severe “pizza face” adult acne until age 36. What worked for me was a morning routine of honey, olive oil and Dr Bronner’s unscented soap. In the morning I wet my hands with water, and massage in honey and leave on my face for 5-10 minutes. I then rise with a small amount of Dr Bronner’s liquid unscented soap. While the skin is still wet, I massage in extra virgin olive oil and let air dry. In 2 days my skin looked human again and has remained so in the past 7 years. Everyone I have shared this tip with, including hormone prone teens, and other adults like me that have struggled with skin problems have LOVED it. In terms of summer skin care, I use raw ivory shea butter; shea butter is a very mild natural sunscreen. Coconut oil is also a natural skin moisturizer that can also double as a deodorant to help improve the health of all your skin. The best thing about this treatment is that honey will moisturize your skin and shrink your pores. Dark spots will also be lightened more than you could ever believe. I am a black woman with keloid-prone skin and it worked for me so amazingly I still cannot fathom how different I look. People who did not know me prior to 2007 remark about my clear glowing smooth skin and cannot believe I ever had pizza face for 2/3 of my life. I have more comprehensive tips in a free booklet I share on that includes engineering controls for your home that includes liberal use of Dr Bronner’s products. Tea tree oil can be irritating to some individuals so I stick with the unscented Dr Bronner’s. I understand your pain but it can get better.

Flo says:

Thank you, Diane. I wonder how would be if I used coconut sugar. May have to try.

DIANA says:

I don’t really have a recipe but I think the last time I made a batch I used about 50-50 coconut oil and cocoa butter (melted in the microwave) and then I mix in the turbinado sugar until its the desired consistency. I have also added almond oil if the mixture is too thick; if the mixture is too hard at room temperature, melt it in the microwave and add more coconut or almond oil. I like sugar better than salt since salt can sting if you just shaved but I have made it with both. Salt works as a water softener and it leaves skin very soft so it can be used in place of the sugar if desired. Turbinado sugar can be too course for some people so you might also try regular white table sugar. You can use any combination of oils that you like and even add a drop or two of essential oils. I have made a salt scrub with lavender oil which is good to use before bedtime. Try making small batches till you find what you like. Be careful not to get any water into it or else the sugar and salt will dissolve.

Katia says:

I’ve been using the Tea Tree scent for my hair and my acne-prone skin and it’s been working great! It’s so awesome to find a pure product that I can use to wash my hair, face, body, and veggies, too. The soap’s brought out my hair’s natural wave, which is great as it could sometimes be hidden by the chemicals in traditional shampoo. I didn’t use any rinses after the soap and it didn’t leave a greasy residue like I read could happen. Should I continue to use just the soap or would it be beneficial to use some sort of rinse afterwards?
Love the blog and the product! Keep up the good work!

DIANA says:

I use the baby mild bar soap on my face, hair and body every day. At first I developed some small dry patches on my face but I used coconut oil as a moisurizer before showering and soon the dry patches went away. I believe it was my skin adjusting to the new soap. I also make my own sugar scrub with coconut oil, cocoa butter and turbinado sugar and I use that to exfoliate my face once a week, before showering, and then I wash my face with the bar soap. The result is very soft but not greasy skin.

Flo says:

I just discovered your blog. Awesome explanations. Is it OK to use the bar soap as a face cleaner? I make my own coconut oil cleanser at night, but was looking for a bar soap for my morning showers to use on my face.
Thank you.

Kirk says:

Thank you so much for your prompt reply and explanation. Good to know our system of measurements isn’t completely arbitrary!

Anyhow, based on your conversion formula, an ounce of undiluted soap costs about 30% more if bought as a liquid instead of in a bar (or more, if you buy the liquid in smaller bottles). That would predispose me to buying the bar soap… except that my anecdotal experience is that I go through the bars much more quickly than the liquid. That seems counter-intuitive since the bars have a higher concentration of soap. Is that something you’ve encountered? Do you have any idea why the bars go faster? I wonder if it’s because I don’t use a wash cloth?

Tiffany says:

Here’s a good tip. Remove them from the packaging and let them dry out for a couple of weeks before you use them. They will last twice as long! The packaging keeps them slightly moist and makes them dissolve faster. I know it seems like a long time to wait, but if you plan ahead it will pay off.

Lisa Bronner says:

Hi Kirk – I absolutely love having occasion to draw on those high school chemistry classes now that I am an adult! (I am totally serious. I’m a bit of a nerd.) So! As you astutely pointed out, in our totally convoluted system of weights and measures in America, we use the same word “ounce” for a liquid measurement (equaling 2 Tablespoons) and a dry measurement (equaling 1/16 of a pound). The correlation between the two is that at sea level, one liquid ounce of water also equals 1/16 of a pound. However, anything with a density different from water will have a different liquid measurement from dry. Stick with me here – I’m getting somewhere. Now, I do not know the exact density of Dr. Bronner’s castile soap. It is a blend of ingredients, but is mostly made up of oils. I’ll go with the density of olive and coconut oils because those are the main ingredients. Both of these oils are slightly less dense than water, but at the amounts we’re referring to in these recipe conversions, they would easily round up to 1 liquid ounce oil = 1 weight ounce oil.

That means, that for most household purposes, in comparing the soap quantity in Dr. Bronner’s bar to the soap quantity in Dr. Bronner’s liquid, you can pay little attention to liquid vs. dry ounces.

If you are planning some sort of large scale project, where the slight difference between the liquid vs. dry would be multiplied, please let me know and I will be happy to do a more exact calculation for you.

Thanks for asking!

All the best,

Kirk says:

Lisa, Thank you for your work on this blog. I’ve used Dr. Bronner’s for years and enjoy the soaps a lot. But they are a little more expensive than other options, and lately I’ve become a more frugal about such things, so I’ve been trying to figure out the most cost-efficient way of using it. (I just use it in the shower, not around the house.) I noticed with interest your comment that the soap content in a 5 oz. bar equals the soap content in 12.18 oz. of the liquid soap. But it seemed like your calculation was assuming an equivalence between the bar’s “ounces” (measuring weight) and the liquid’s “ounces” (measuring volume). But those two kinds of “ounces” aren’t usually equivalent, are they? I trust you know what you’re talking about, but would mind explaining why the volume/weight distinction isn’t affecting your calculation?

Lisa Bronner says:

Hi Zen – There is no sodium hydroxide in the Dr. Bronner’s soap that you’re buying. The NaOH molecule is completely split apart and it’s parts reattach to other molecules, forming completely different substances: soap (scientifically called sodium cocoate) and water. You can read more about the chemistry behind it here: Let me know if I can be of further help!

Hi Larry – Most of our soaps are either induction sealed or pressure sealed. Only the 2 oz and 4 oz bottles are not.

Hi Erin – The only dispenser that works is a foaming pump dispenser. Dilute the soap at a 1:5 ratio with water for that. I do not recommend the dish detergent dispenser.

All the best,

Erin says:

Can you recommend a type of dispenser for Castile oil when used in shower? As you discussed in the past it does clog and spews liquid out on its own. Someone mentioned dish detergent dispenser. Thank you

About Lisa Bronner

My grandfather was Dr. Bronner, my family makes soap, and I share ways to use it plus tips on greener living.

Learn about my book, Soap & Soul!

Learn More

Print Now!

Castile Soap Cheat Sheet

Dilute! Dilute! OK! But how much? Print this guide!


Print Now!

Bar Soap Cheat Sheet

Bar Soap aficonados, this one's for you!