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There have been several studies looking at whether it is safe to use products past their expiration dates. They have all shown that it is safe to go past the date somewhat. None, however, exactly define how far after the expiration date is safe. There is no data that I am aware of regarding the Obagi Nu-Derm System. The result of these studies, therefore, mean that it is probably safe to use the products a short time past the expiration date but you should not stretch the time and absolutely should not use any of the products if they do not look like new products.
If you are trying to lighten freckles, the NuDerm line will be the most effective with Tretinoin. Obagi recommends that you use the strongest Tretinoin that you can tolerate for maximum skin cell turnover. Usually it takes a couple months in order for your skin to normalize after any...
Since you are still peeling, your skin has not completely adjusted to the Retin A. You need to continue with the system as suggested by your doctor. The skin will look more wrinkled until your skin adjusts to the the Retin A and the peeling stops. You have not created any permanent damage.
Obagi has several moisturizers. We recommend Hydrate and Hydrate Luxe if you would like to use a moisturizer with your other skin care products. It is patient preference to whether a moisturizer is needed or not.
