Quick Question: How Long Should I Use a Skin Care Product Before Giving Up On It?
According to Dr. Kenneth Beer, a dermatologist in Palm Beach, FL, for the December 2007 Glamour: “The complete benefit of skin creams won’t be visible until after a full cycle of skin-cell turnover to take place, at least a month.” He adds that sun and smoke interferes with the results you get, so avoid the sun and cigarette smoking (bad for the skin, even in moderation) at all costs.
With that said, give your next skin care cream a full month before you decide it is (or isn’t) working! 
