“Retin products are typically used at night because the sun breaks them down, making them ineffective,” suggests Ryan Neinstein, MD, a plastic surgeon at NYC Surgical Associates. “And the overall effect of the retin is to thin the skin, which makes it more sensitive to the rays of the sun. I suggest patients use their retinol cream and retinoid products at night, but they should really avoid using them during the day when sun exposure is expected. Most importantly, always use a minimum of SPF 30 over the retin-treated areas.”
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