A science-based comparison of the three most talked-about non-surgical hair loss treatments — and what the evidence says about each. Non-surgical hair loss treatment has never been more discussed — or more confusing. Walk into a dermatology clinic or medical spa today and you're likely to encounter a menu of options that didn't exist a decade ago: PRP, exosomes, stem cell therapy, microneedling cocktails, low-level laser therapy. Each is marketed with compelling before-and-af