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Double Hyaluron Liquid stated Is 5% 1. If ordering a size of 50 grams, how many % will it contain Hyaloronic? 2. In formula 5, if you want to have 5% Hyaluronic, how much should you put in? Thank you.

Please let me know. Thank you very much.

Please suggest a book that collects the components. (chemical and natural substances) used in cosmetics and tell the details of the various uses of each thank you very much

Hello, I want to make a serum for clear face, reduce acne scars. 1. Please advise what ingredients should be used. 2. What does each one do? 3. Can it be developed into a formula? ลดริ้วรอย add moisture, can it? then just change the active ingredient) (have a blender) newbie thank you very much