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Hello, I would like to ask 2 questions that 1. If in the formula there is สารสกัดจากธรรมชาติ are about ten kinds. but want to use สารกันเสีย as 1,2-Hexanediol can be used with Ethylhexylglycerin is it effective? yes (in the formula, want to avoid groups สารกันเสีย Benzene bands Benzyl Alcohol and Ph...

I want to know which of the following nutrients are absorbed into the skin well? Or which one will be able to penetrate the skin only when adding any substance into the formula? Coenzyme Q10 Acetyl glucosamine Safe B3 Lycopene Kojic Acid Alpha Lipoic Acid Azelaic Acid and Guys สารสกัดจากธรรมชาติ tha...

I want to know what nutrients are dissolved in oil. will be absorbed into the skin better Are nutrients dissolved in water? If it's better, what if the formula is almost completely oil-soluble nourishment? Can the substance be made into a gel form?