Do Vitamin C creams make you sun sensitive?
No – in fact it’s the reverse! But, first of all make sure your Vitamin C is working for you. The best are serums, pHd to about 3.0 from 10-20%. 20% is better but start with 10% to make sure you tolerate it and work up from there. Or use Vitamin C in a serum or gel that is combined with other antioxidants in therapeutic percentages (link to antioxidants here).
Vitamin C stabilizes skin cell (keratinocyte) DNA and helps to prevent damage to skin cells from UVA and UVB. Use it under your sunscreen but night is fine if you can’t. Glycolics, alpha and beta hyroxys and retinoids like Retin A DO increase your suns sensitivity.
Hope this helps, Dr. I