You will typically notice an improvement in the quality and appearance of your skin within the first 24 hours. After 2-3 treatments a thicker more robust, collagen filled cellular matrix will produce more consistent and noticeable improvement. And 6 or more treatments may be recommended for scarring, laxity and wrinkles. For hair regrowth some reactivation typically appears within the first two weeks, with noticeable improvement after about 5 weeks.