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!
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