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I hope someone can answer my question please.

Should I measure the pH value after each addition of active ingredients in my cosmetic formula to ensure that the active ingredient remains within its stability range?" For example, I have an Alpha Arbutin serum that is stable at a pH of 5-7. I added aloe vera juice to the water, and when I measured the pH, I found it to be 3.8.Should I raise the pH to 5 for the Alpha Arbutin, or is it unnecessary? Thanks in advance.

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  • $\begingroup$ Well, you should adjust final pH. $\endgroup$
    – Mithoron
    Commented Dec 6 at 23:32
  • 1
    $\begingroup$ If one ingredient is pH sensitive the better procedure would probably be to adjust the pH of any additive solutions to acceptable levels before mixing. $\endgroup$
    – jimchmst
    Commented Dec 7 at 1:24
  • $\begingroup$ Is glycolic acid ph sensitive? $\endgroup$
    – Free9s
    Commented Dec 7 at 14:47
  • $\begingroup$ Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. $\endgroup$
    – Community Bot
    Commented Dec 7 at 21:14

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