Cosmetics Formulation Development


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bother answering Some vitamin C serum

Postby w.w.w.ydduqhater » Sat Jul 14, 2018 5:11 pm

made a purchase Stabilized Vitamin C (Natural-C Glycol™) Serum was gone in May and was exposed to acne so I stopped using it now and it's gone. When I used it yesterday, the serum was more yellow than when I bought it. Should I continue to use it? Is it stable? Will it be dangerous or normal? PS. When you buy a serum, put it in a bottle of tea-colored cream with a spray head. Store it in a drawer well out of direct sunlight :oops:
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Re: trouble answering Some vitamin C serum

Postby touchzhakornxx » Sat Jul 14, 2018 9:04 pm

can still be used But the performance may be slightly reduced. no danger Recommended to keep in the refrigerator as well and Vitamin C will deteriorate near 100%, will be yellow near yellow drug. which is very dark yellow About betadine, thank you.
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Re: trouble answering Some vitamin C serum

Postby w.w.w.ydduqhater » Sun Jul 15, 2018 11:59 pm

I tried spraying it on a tissue, it's very yellow. About yellow pineapple juice. So I thought I would cure my acne first. It's a bit clogged right now. If it was very yellow then I would buy a new one.
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