It seems that platelet rich fibrin injections have some promise related to improving skin laxity and collagen production. Aside from needing a few treatments and the results being delayed by several months, if laxity is the only concern around eyes, mid-face and nasolabial folds, would PRF be a good option? Is there an area where PRF isn't recommended? For laxity improvement only, what else would be more recommended and beneficial (mid-face, under eyes, nasolabial folds)?