Which hair loss treatments actually work?

Hair loss is common, but there are many different causes and potentially many different treatments.From topical ointments to light therapy, to scalp massage routines. What works to slow, or even reverse, hair loss?Norman and Tegan comb through the evidence for approved treatments and too-good-to-be-true snake oil.References: Male pattern baldness - HealthdirectMale Androgenetic Alopecia with an overview of treatments - NIHFemale pattern hair loss - HealthdirectWhat is minoxidil, the anti-balding hair growth treatment? Here's what the science says - ABC NewsLow-Level Laser (Light) Therapy (LLLT) for Treatment of Hair LossAutologous platelet-rich plasma therapy for pattern hair loss: A systematic review