Home Cosmetic Science Talk Formulating Skin Does the Rec. Percentage apply to the entire solution or to the active ingedient?

  • Does the Rec. Percentage apply to the entire solution or to the active ingedient?

    Posted by Wickers on June 24, 2020 at 9:46 pm

    Hi,

    I was wondering: you know how most suppliers usually list the recommended percentage for an active solution? Like 0.1%-2%?

    What if the ingredient supplied is a peptide, for example, and the INCI is: Water, Glycerin, pentapeptide-3

    If the active (or extract) is listed at 20% of the solution, do I have to scale up the recommended percentage to 0.5%-10%?

    I’m not sure if they mean 0.1%-2% as in the active ingredient is supposed to be that amount, or if the whole solution is to be that percentage of the final formulation.

    This was puzzling me for quite a while, but I thought it was a stupid question.

    Thanks in advance!

    jenchemist replied 3 years, 11 months ago 2 Members · 2 Replies
  • 2 Replies
  • Wickers

    Member
    June 25, 2020 at 7:56 pm

    Please reply! Thanks :)

  • jenchemist

    Member
    June 26, 2020 at 4:20 pm

    Vendor recommendation is for how to use their specific product. So recommended % usage applies to the whole solution, no other math required. 

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