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Home Cosmetic Science Talk Formulating pH of body wash

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  • pH of body wash

    Posted by K4r1n4 on January 12, 2022 at 10:14 am

    Recommendations on the target pH value of body wash? According to literature, the average pH of the skin is 4.7 and acidic conditions seem to preserve the resident bacterial
    flora, whereas an alkaline pH causes dispersal from
    the skin. 
    Generally, pH of 5.5 is recommended, but if the average skin pH is 4.7, should the target be around 4.7 too? 

    mikethair replied 1 year, 4 months ago 4 Members · 3 Replies
  • 3 Replies
  • PhilGeis

    January 12, 2022 at 11:57 am

    It’s largely irrelevant.  The product is diluted and rinsed off in use.

  • OldPerry

    Professional Chemist / Formulator
    January 12, 2022 at 4:44 pm

    Exactly. When someone applies a body wash whatever pH it started with is going to get very close to pH 7 or whatever the pH of the water you’re using is. For in-use, pH 4.7 or 5.5 is irrelevant. (although it could matter for your preservative system).

    It’s also nice to remind people that skin being a solid does not actually have a pH. 

  • mikethair

    January 15, 2022 at 2:34 am
    Yes, a lot of BS on pH with skincare.
    And here is my spin on the issue: