by staff » Tue Aug 31, 2021 8:13 pm
Hello, % is a unit of concentration, meaning there is such a substance. at a concentration of ...% in the formula, then when applied to the skin It cannot be counted as concentration. Because it's on the skin, not just the aforementioned formula. But it's sweat, moisture, fat on the skin. If you can count it, it must be how many grams (or milligrams) are on the surface.
Staff - MySkinRecipes