Where should I incorporate a vitamin C serum into my regimen? I use Aczone in the morning and Tretinoin at night.

Question

I don't want the vitamin C serum to be ineffective and also don't want adverse effects from interactions.

Fereydoon S. Mahjouri, MD · Answer

You would want to use a Vitamin C in the morning underneath the Aczone. Make sure you are using an L-ascorbic acid form of Vitamin C. iS Clinical Pro-heal is a great choice. After you put it on, let it sit on the skin for about 5 min before applying the Aczone.

Where should I incorporate a vitamin C serum into my regimen? I use Aczone in the morning and Tretinoin at night.

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