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Interested in using PiteraEx ™ ( Saccharomyces Lysate Extract )About 2% make a slap water, please advise what ingredients can be added to make it more effective in skin care. Or just use this is enough. and would like to give advice on how to mix it, thank you

Hello, prepare to do Skinceutical by entering Vitamin C 10% Vitamin E ( dl-alpha tocopherol )2% Ferulic Acid 1% portion of น้ำกลั่น will add กลีเซอรีน 5% gel ว่านหางจระเข้ 5% Does this formula work and the solution Ferulic Acid can use Propylene Glycol it soluble, what proportion do you use or is th...