If you want the serum to be thicker but clearer, we recommend adding
Pro Polymer™ (Gel Maker) 1%, but if you want a opaque color, add
Light Cream Maker™ or
Satin Cream Maker ™ 1% because I can't see the ingredients. So I recommend this 3 bass. which can tolerate high electrolyte. Follow this link to be a whitening agent that does not irritate the skin
shop/161- whitening skin irritation. Try to choose the ingredients you like. (For the chance of allergy depends on the skin of the individual.)