Not enough to make a difference....
answered 2 years, 6 months ago
Dermatologist Fredric Brandt, MD tells ELLE.com "If you're buying over the counter, look for 2% retinol, that is the most percentage permitted by the FDA," informs Brandt. "I use that in my Glow product, which is time released, so the benefits last all day."
answered 3 years, 1 month ago
(New York City)