Mix Kojic Acid Powder Into Commercial Lotions for Optimum Effectiveness

To mix kojic acid into an already made commercial lotion it is important not to over heat.

All soaps and lotions require some heat in the manufacturing process. But getting them too hot will destroy the enzymes, vitamins and the properties of the lotion. To mix kojic acid powder to an already made lotion, heating (warming) works to dissolve kojic acid faster. This makes it a bit watery so it is easier to work with. When you mix kojic acid into a pre-made lotion that will give it skin whitening properties. The trick is to know the limit that you can warm your lotion to. You want all of the ingredients to remain effective, but want the kojic acid to mix and dissolve quickly.

How to Mix Kojic Acid into LotionOver-heating will also harm the preservative system

This is one reason why a re-heated lotion or cream will become dark brown and also become contaminated faster, shortening the shelf-life.

If you fear that you may over-heat your lotion then fill your sink and stand your lotion container in hot tap water. When it becomes watery it is hot enough.

Caution: Using a microwave oven is tricky as it is very easy to over-heat small quantities of lotion. Microwaves heat unevenly! So to use this method use short durations of 10 – 20 seconds. Stir between cycles until temperature is a uniform 100F – 110F (38C – 43C).

Kojic Acid Interacts with Iron Content

Another reason and probably the most common one for your lotions turning brown is due to kojic acid interacts with any iron “fe” content in the base lotion. Making your lotions from scratch is the best way to make an all natural lotion that will have a long self life and no color issues. In our upcoming member’s area, we teach step by step how to create products with long shelf lives that have the right ingredients in the right amounts to avoid color or contamination issues.

Adding Kojic Acid to Pre-Made Lotions

If you make pre-made lotions into skin whitening lotions like this often. Then you could use a preservative and add .5 percent during cool down when below 100F – 38C to reinforce a long self life. (We use Linatural from Organic Creations in our made from scratch products. It is certified for use in organic products and is paraben free).

When mixing kojic acid we consider 110F – 43C max. But staying closer to 100F – 38C or under is better. Even if your lotion stays gritty from under-heating after stirring well, it will completely dissolve in a day or two. Just shake a couple of times a day if this is the case, as kojic acid powder is water soluble. (This usually does not occur unless too much kojic acid powder is used).

Step by step guide to mix kojic acid powder:

  1. Empty lotion into suitable double boiler pan or microwavable container (Glass Pyrex works for either). Or just let a glass mixing bowl stand in hot tap water (takes longer). No double boiler? The hot water bath method would be a large enough pan of water on a burner that you can place your heat resistant lotion container into. Allow the hot water to come just above the halfway point. Place a wash cloth on bottom of hot water. Or use a slow cooker to warm water and place your lotion contain in that. We teach both everything but the microwave method when making from scratch.
  2. Heat lotion while stirring, so it heats uniformly, until watery @ 100F – 110F Fahrenheit = 38C – 43C Celsius MAX (Do not add kojic acid powder yet)
  3. Remove lotion from heat source
  4. Add and mix kojic acid while stirring until dissolved, you may use a stick blender (if your container is deep enough to submerge blender head) for just a few seconds if you wish. Keep blender submerged and pulse to avoid sucking air into the lotion. When you mix kojic acid into lotions in large quantities a stick blender is ideal. But when mixing small amounts you may choose to use a whisk or spoon. In any case mixing lotion that is under-heated may stay slightly gritty but kojic acid is water soluble and will completely dissolve in a day or two without re-heating.
  5. Pour lotion or cream back into  container while still liquid (This is where heating to the upper limit makes this easier to work with). A small funnel may be needed. Keep top off until cooled to avoid condensation.

Mix kojic acid powder in the following amounts to your lotions.

(NOTE: Do not add above 2% to your lotion. It is not the higher strength/percentage of kojic acid, it is the everyday application that makes kojic acid effective. Plus high percentages can cause skin irritation in long-term use requiring you to stop your daily regimen. 2% is normal, use 1% if you have sensitive skin)

8oz lotion

  • 5 grams = 2 level teaspoons. Add to 8oz for 2.16% lotion
  • 2.5 grams = 1 level teaspoon. Add to 8oz for 1.08% lotion

4oz lotion

  • 2.5 grams = 1 level teaspoon. Add to 4oz for 2.16% lotion
  • 1.25 grams = 1/2 teaspoon. Add to 4oz for 1.08% lotion


Creams and lotions are made up of a high water content usually 50 to 80 percent water and the remainder are oils, additives and an emulsifier that allows oil and water to mix (the difference in creams and lotions is mainly water content, creams being lower in water & higher in oils). When you mix kojic acid powder it dissolves due to the water content and when the lotion is heated first slightly it will dissolve and incorporate faster and helps your lotion to not be gritty from undissolved kojic acid, but if it is a little gritty at first it will eventually dissolve without re-heating.

Making your own lotions from scratch is the best way for longest shelf life and effectiveness. We will be adding guides that teach you how to make your own lotions that are optimized for skin whitening and are super effective when you mix kojic acid in them. Currently we are updating our website and will add those soon to our member’s area along with 30% off kojic acid prices for members only.

More facts about “Kojic Acid Powder

When you make your lotion from scratch properly by never over heating, the shelf life is over a year with a functioning preservative system.


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33 thoughts on “Mix Kojic Acid Powder Into Commercial Lotions for Optimum Effectiveness

  1. pls I work with litres,kilograms and grams and I would like to know how many grams of kojic acid to use for 200litres of lotion because I do get that Browning effect afterwards and i don’t like it

    • I used our “Recipe Calculator” found in our member’s area (coming soon) to calculate how much kojic acid powder for 2% strength to make one liter of lotion (1000 milliliters = 1 liter). You can multiply this by how many liters you wish to make.
      NOTE: Browning effect which you speak of is usually due to kojic acid interacting with iron content of a lotion. This can cause a temporary staining of the skin. Our member’s area shows how to formulate “kojic acid lotions” that do not turn brown with an additive that prevents this. Use our contact form to request when it is open for registration. Contact Form

      Image of Cebulea's member's calculator results

  2. Hi love ur site ,I mixed my body cream with kojic powder and snow white powder but the cream is rising up (swollen ) I don’t knw wat wrong pls enlighten me

    • I do not recommend mixing kojic acid powder with any other skin whitening additives (hydroquinone, arbutin, etc.), as there is no need for anything other than kojic acid to be most effective as the main skin whitening additive. But there are vitamin and herbs that can enhance kojic acid lotions/creams that we teach in our member’s area (coming soon). Use our contact form to request when it is open for registration. Contact Form

  3. hi pls is it okay to mix kojic acid and niacinamide together into my lotion. both were dissolved seprately. please can you let me know if its okay. Thanks

    • Niacinamide is vitamin B3 and is one of the best additives in skin lotions along with vitamin C and some other vitamins and herbs.

      We list the best additives that enhance kojic acid whitening lotions and creams in our member’s area that enhance skin whitening. We do not recommend hydroquinone, arbutin or other main skin whitening additives. But vitamins and herbs can make super whitening lotions and creams formulations that enhance kojic acid properties and are very good for most skin types.

      So yes! Niacinamide is a recommended additive. No need to dissolve separately just add at the end of your formulation or to an already made lotion/cream as they already have enough water to dissolve kojic acid and niacinamide as they are both water soluble.

    • Hi Avalon, It is not recommended to mix more than what you would use or sell in a 2 week or at most 30 day period. If you buy a base or make your lotions from scratch you should add 1% preservative and 2% kojic acid. When mixing 1 gallon lotion at a time that would be 128 ounces of lotion. So 2.56 ounces or 71.68 grams of kojic acid would be 2%. Cut that in half to make a 1% kojic acid gallon of lotion.

      Complete instructions come with each order. Our soon to come members area will have further instructions for making large batch lotions for commercial manufacture. Also when making large quantity keep in mind that many additives will react to any iron content that the base lotion contains.

      Kojic acid is an additive that reacts to iron and that will turn lotions and soaps light to darker brown depending on the amount of iron content of your lotion. An additive added to the formulations we teach in our member’s area will neutralize the iron and prevent lotions from turning brown. Also over heating will cause lotions to turn brown and destroy the preservative system.

      So it is recommended that you test small amounts 4 to 8 ounces to perfect your formulas before making large batches.

      Use our contact form to request notification when member’s area is open for registration. Contact Form
      Thank you

  4. I added KA in melt&pour soap, at 1.5% but the final product is brown. Also I added in an all ready make cream without heating ,but after few days (4) the cream became yellow.

    • Turning brown or yellow is usually due to kojic acid interacting with iron content of a lotion. Our member’s area shows how to formulate “kojic acid lotions” that do not turn brown with an additive that prevents this. (Member’s area coming soon) Use our contact form to request when it is open for registration. Contact Form

    • Hi,
      Kojic acid powder’s shelf life is over 2 years and can be extended by keeping it in a vacuumed zip bag in a completely dark refrigerated environment.

      Once it is incorporated into a lotion the lotion itself can turn rancid from 1 week to slightly over 1 year depending on the preservative system.
      Thank you

  5. Hi
    I had bought kojic acid powder and when I tried to dissolve in water it become gelatinous , I don’t think an acid behave like this so I am too much worried about the purity ,can you please say what is happening here . is it okay to use kojic acid as a serum by just dissolve it in distilled water ?

    • The only reason that may happen is if you added too much KA powder to too little water. It is imperative that you mix kojic acid at the proper percentage. We include complete instructions with each order. Each new batch of kojic acid we receive I make a 4% solution in 2 ounces of distilled water to test the kojic acid for solubility and have never had this problem and would not sell any that did this. Sounds like improper knowledge and use on your part, follow the directions that come with product and you will NOT have problems. NO I do not recommend that you make a serum with water alone. There are so many benefits of natural ingredients when using an all natural lotion, plus it goes so much further with the spread-ability when using a lotion, it would be such a waste to use that type of mixture. Thank you, Lea

  6. Hi I just saw this and am very interested because I have always wanted to make my own safe lightening cream, and soap.
    Am so looking forward to the members area.
    But I would like to know if it is safe for children between the ages of 4-8 to use kojic acid for skin lightening ?
    This is a great job u guys are doing,please keep it up

    • Hi Noma,
      I do not recommend kojic acid on children (they are not responsible enough to protect themselves from the sun), leave it to their personal choice after they are over 18. If there is any skin health reasons for using kojic acid on children you MUST contact your professional health care provider about that. There are many all natural lotions and soaps you can make at home that will be very beneficial for your whole family that do not have to contain skin lightening properties. Plus you should be making your own natural products for overall health reasons and to avoid the synthetic chemicals from commercial skin care products. Thanks, Lea

  7. Thank you so much for all the good information.
    I make my own body butter with shea butter and verious carrier oils, can i heat my kojic power in lets say my olive oil and add it to the mix.
    Also i use teatree oil any conflicts there with the kojic powder.
    Thank you,
    Keep up the good work

    • Hi Shellie,
      No that probably will not work very well. Kojic acid is not soluble in any oils, it will stay gritty and not incorporate in a recipe that contains all oils. Kojic acid only dissolves completely in water and water based juices, etc.
      What you would need to do is dissolve the kojic acid in distilled water or aloe vera juice, etc. This would require adding an emulsifier like “emulsifying wax” so the water and oil would emulsify. But then by adding liquid to your body butter it will need to used up within days or it will grow bacteria. To preserve it you can add vitamin E T-50 to preserve the oils and you should add one of the natural preservatives that will preserve it for a few months or more.

      If you try to add kojic acid in this way you will need to experiment with very small batches till you perfect your mostly body butter recipe. Or for your kojic acid product you may wish to make a very thick cream with 60-80% oils, 4 to 8% emulsifying wax, with the remainder of a 2% kojic acid of total dissolved in the proper water percentage with a .5 to 1% preservative at 100F degrees.
      Our upcoming member’s area will have tested recipes for this and many more. Use our contact form to request when it is open for registration. Contact Form

      There should be no conflicts with tea tree or any other EO with kojic acid.
      Hope this helps, Lea

  8. hi, if I am to make my lotion from the scratch how do I mix it , do I just pour it into my lotion or I have to mix with water or oil? (2) when do I pour it inside the lotion, is it from the water phase or when I am done mixing the lotion. stil waiting patiently for the member’s area

    • Hi, Kojic acid is soluble in water. You can add it to the water phase or wait until you mix your water and oil and obtain emulsion first, then add it and mix with hand blender. In other words if you have a recipe that is reliable to obtain emulsion you can add it to the water phase. Or if your recipe is at times difficult to achieve emulsion add your kojic acid along with other additives after emulsion. Our members area will go over this and also go over how to keep your formulas from turning brown. Thanks, Lea

  9. I make hot processed soap and have for a while. As I live in Africa there is a demand for Kojic Acid soap by the indigenous people. I have bought Kojic from a reputable company in the States but am glad I’ve found your site. One question though – I have been mixing my dissolved Kojic after the cook – my soap temp is around 170F. Is this acceptable. Also look forward to when your members site is up.

    • Hi, you need to be aware that most all enzymes and natural ingredients and vitamins are destroyed at temperatures above 140F/60C. Even over 120F/49C some natural additives are compromised (Like natural preservatives). The closer you formulate to near 100F-115F/38C-46C when adding natural ingredients the better your end product will retain the active enzymes and vitamins. Consider changing to the cold process when formulating natural ingredients soaps.

      Currently we do not ship outside of the USA but our upcoming members area will have an international/non-shipping option that does not sale but will teach how to formulate natural soap, lotions, creams, ointments, tinctures, infusions and more interesting DIY recipes. Sorry for delaying this member’s area but it is a lot to do for two busy people and time flies by so fast. So bookmark and keep watching.

  10. I’m a soap maker and I would like to make a skin lightening soap with Kojic Acid. I’m keenly following your posts to learn more on how to go about it.

    • Hi, We are working on a member’s area that will have many recipes and teach how to make skin lightening products. Since you are an experienced soap maker you can add kojic acid at 2% to your water or when you add your extra added ingredients and mix as usual with your hand blender. Kojic acid powder is soluble in water.
      Thanks, hope this helps

  11. Hi! Firstly, I love your website! Thanks for all the info! 🙂

    I was wondering if you think it is a good idea to heat organic castille soap and then add kojic powder.
    Also, what about adding it to body creams and applying it? But that is too risky, because it would be on your skin for way over the time limit it should be when compared to the soap.
    Or what about, when you add kojic powder to any liquid body soap, without preheating it, as it is already liquid and the powder is water soluble?

    Would appreciate any help and info regarding this! Thanks in advance! 🙂

    • Q. I was wondering if you think it is a good idea to heat organic castille soap and then add kojic powder. —
      A. This is known as “Soap Rebatching” Search that and you will find how-to recipes for it.

      Q. Also, what about adding it to body creams and applying it? But that is too risky, because it would be on your skin for way over the time limit it should be when compared to the soap. —
      A. We recommend lotions and creams that remain on to be 1% to 2% maximum, soaps that are washed off within 10 minutes can contain up to 5% kojic acid, normally 3 or 4 percent.

      Q. Or what about, when you add kojic powder to any liquid body soap, without preheating it, as it is already liquid and the powder is water soluble? —
      A. It may take several days to completely dissolve. Plus adding kojic acid to liquid soap usually decreases the suds to nearly nonexistent.

      Nothing beats using proven formulas for making your soaps and lotions from scratch for optimum effectiveness. Our soon to come members area will have easy to follow recipes for all of the above.
      Thank you, Lea

  12. Hi I am interested in buying pure kojic acid from you but I am worried that I will not make the lotion right while heating. How will I be sure that I do not overheat the lotion? Do you use a thermometer?

    • We include with every order complete instructions on mixing, heating and usage, with an included suggested regimen.

      Just heat till warm to the touch. If you have a meat or candy thermometer then yes you can use that (100F-115F). You can even fill a sink with hot tap water and let your lotion warm up in that. If you under heat it or add your kojic acid to room temperature lotion, it would only stay a little gritty for a couple of days. If under-heated just shake it daily and it will soon dissolve completely. So under-heating is better then over-heating. Thanks – Lea

    • 1 teaspoon weighs out to be about 2 1/2 grams. So 2 teaspoons equals about 5 grams. We use an accurate calibrated precision scale that weighs down to 1/10 of a gram. Along with research into weights and measures that say the same. These facts confirm that our scales are also correct. When you buy one of our kojic acid packages you always get between .5 to 1 gram over the purchased weight. Thanks, Lea

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