A member asked:

Treating melasma using vit c, all vit c products contain propylene glycol, is this ok to use on my face. tyvm?

A doctor has provided 1 answer
Dr. John Chiu answered

Yes: but I'd doubt that vit c would get you the result you desire.

Answered 10/30/2017

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Is propylene glycol (pg) in dental mouthwash safe?

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