Hello, I want to make a serum
Ethyl Ascorbic acid in oil-free formulations But because you have to put
Protec™ OX and
Protec™ UV in the formula to help protect
Vitamin C Tween 20 this, must add oil in the formula to dissolve these two? http://www.myskinrecipes.com/shop/emulsifier/175-polysorbate-20-tween-20.html]Tween
Tween 20 and
PEG-40 Hydrogenated Castor Oil can it be used or these 2 can only be used for soldering?
น้ำหอม Thank you.