Research describes LLLT as not associated with serious side effects, but experiences differ. Some users have reported mild scalp discomfort or headaches. People taking photosensitizing medication should consult their doctor. This treatment might work best as part of a broader hair-loss plan rather than by itself.
There's an increasingly popular option for people dealing with hair loss. It's low-level laser therapy (LLLT) and uses gentle light through a diode-coated hat you put on your head. Before buying a new device, however, you must understand its intended use and how to apply it properly.