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on 5/10/21Your brows, lashes, and hair will stay thick through their natural growth cycle, then they will return to their regular state when you stop using the serum. The good news, is that you can back off after you achieve a desired look. Once you reach a point of satisfaction, you can apply the serum 1x per day. Another option is to decrease application to three or four times per week. When you want to pump up the results again, go back to 2x per day use.