Tretinoin works best when used within a skin care program that includes protecting the treated skin from the sun.
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One study found that with daily tretinoin application, collagen in the skin increased by up to 80% over 10 to 12 months.
Tretinoin Cream can make your skin more sensitive to ultraviolet light.
Most people using Tretinoin find that side effects lessen as their skin adjusts to treatment.
Especially if your skin is dry.