Home Cosmetic Science Talk Formulating Skin 30% lactic acid @ph 2 solution

  • 30% lactic acid @ph 2 solution

    Posted by abdullah on July 5, 2023 at 5:06 am

    I have recently made a 30% lactic acid solution @ pH 2. The use instructions is to apply it to face and wash it after 5-10 minutes. Use it once a week.<div>

    10 people have used it and it was tolerable for 9 people at first use. One person who has acne couldn’t tolerate it.

    My questions are:

    1. Is 5-10 minutes use duration and once a week use ok for such a product?

    2. Is it ok to use a 2% sodium salicylate solution daily if you are using this 30% lactic acid solution once a week?

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    abdullah replied 7 months, 2 weeks ago 3 Members · 14 Replies
  • 14 Replies
  • microformulation

    Member
    July 5, 2023 at 7:52 am

    While your Region may be different, in the US that product would be “For Professional Use Only” and restricted to application in a Treatment setting. You may want to reconsider your pH.

    https://www.fda.gov/cosmetics/cosmetic-ingredients/alpha-hydroxy-acids

    • abdullah

      Member
      July 5, 2023 at 11:36 pm

      Yes i am not in the US and it doesn’t have any regulatory problem.

      We are currently selling an 8.5% lactic acid solution. But the effect is not very noticeable bu consu9 as 2% salicylic acid product that we are making.

      This 30% lactic acid solution idea was to make a chemical peel that consumer notices the benefits more like the ordinary 30% glycolic+2% salicylic acid. This product has pH 3.6 but as 30% lactic acid is milder than 30% glycolic+2% salicylic acid and less effective peeling agent, i reduced the pH.

      This 30% lactic acid product also has pH ~2. So i though it may be safe.

      https://onlyyourx.com/product/arbu-30-30-lactic-acid-peel/

  • paprik

    Member
    July 5, 2023 at 2:11 pm

    Oh wow, yeah .. definitely would not fall under commonly available cosmetics at this % and final pH.

    Looks like CosIng is broken (couldn’t find corresponding opinion under Lactic acid), but found CIR (cosmetic ingredient review) opinion = ≤10% and pH ≥ 3.5.

    https://online.personalcarecouncil.org/ctfa-static/online/lists/cir-pdfs/PR758.pdf


    But yeah, your regulations might be different. I would not say by much tho.


    From the times when I had acne, I can imagine how much this would hurt and sting if I would apply it on it.

    Acne is basically broken skin - try to cut yourself and squeeze lemon juice in it 😀
    Definitely not recommended.

    My recommendation would be to use some form of serum, which would stay on the skin. It would be weaker and would have time to work. Lactic acid is a great ingredient which allegedly helps to ceramides and skin barrier. I do use it in my facial spray/toner. Used to have a serum, but as formulator I do have 100 serums on hand all the time and could not stick with it 😀

    • abdullah

      Member
      July 5, 2023 at 11:43 pm

      We sell an 8.5% lactic acid solution that we recommend once or twice use per day and dont rinse. But most of the consumers dont notice the benefit too much as they do notice a salicylic acid product. So we thought to make an AHA product that its effect is more noticeable.

      In this photo, salon products can have 30% lactic acid.

      What is a salon product?

      Can we use a salon product by our own or at home?

  • microformulation

    Member
    July 6, 2023 at 7:35 am

    A salon product is applied by a skincare practitioner in a treatment setting.

    Again, even if your Region has no Regulations in this regard, it is still a safety issue with potential liability issues.

    • abdullah

      Member
      July 7, 2023 at 1:53 am

      Got it

      Thanks

      • microformulation

        Member
        July 8, 2023 at 9:50 am

        Honestly, if you are going to make an aggressive peel and you don’t care about the “Professional Use Only” precautions, you should look at Jessner and Modified Jesner Solutions.

        • abdullah

          Member
          July 9, 2023 at 1:28 am

          Does jessner solution need pH adjustment or just mix acids in ethanol and that is it?

          • microformulation

            Member
            July 9, 2023 at 8:38 am
          • In Compounding Pharmacy, “Remington’s Science and Practice of Pharmacy” served as a reference guide. According to this authoritative source, a pH of 1.9 was considered the standard for certain solutions. However, it is important to note that pH adjustments may be necessary to achieve the desired pH level as specified by the formulation.

          • The Jessner and “Modified” Jessner Solutions, once prepared, were typically sent directly to the clinic or issued to the Dermatology Clinic through prescription. It is crucial to emphasize that these solutions were never directly provided to a patient, client, or customer. This approach is due to the inherent liability associated with the product and the importance of proper administration under proper supervision.

  • abdullah

    Member
    July 9, 2023 at 8:45 pm

    Thank

    In Modified” Jessner Solutions which has 17% salicylic acid, 17% lactic acid & 8% citric acid solids, what is the benefit and function of citric acid?

    I mean what does citric acid do that salicylic & lactic acid can’t do?

  • microformulation

    Member
    July 10, 2023 at 1:15 pm

    I’m not trying to be pretentious or difficult, but I can’t discuss that particular INCI Deck in-depth due to a contractual issue. All I can say is that the Original Formulator, Dr. Dolezal used that as a pH modifier and for functionality.

  • abdullah

    Member
    July 10, 2023 at 9:29 pm

    Ok no problem

    Some more questions

    1. How long should Modified” Jessner Solutions stay on skin?

    One source said 1-2 minutes. Another said 4-5 minutes. Another said at least 4 hours. That is a big difference.

    2. How often it should be used?

    One source said weekly, one said every 10-14 days, one said once a month.

  • microformulation

    Member
    July 10, 2023 at 10:03 pm

    It is advisable to direct those questions to someone with expertise in a Clinical setting. Our involvement was limited to the compounding
    aspect, and we were not directly involved in the treatment process.

  • abdullah

    Member
    July 11, 2023 at 1:30 am

    Ok

    Thank a lot

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