Caffeine applied topically to the scalp, works through 4 different mechanisms to promote hair growth:
- Caffeine activates a key enzyme that increases energy production in hair follicles.
- It counteracts the suppressive effects of testosterone on hair growth.
- It stimulates cell metabolism by turning on the IGF genes that accelerate hair growth while inhibiting the TGF genes that suppress it.
- It repairs hair follicle DNA that has been damaged by the sun.
Indeed, topical caffeine shows great promise in slowing down existing hair loss and promotes new hair growth by waking up your follicles, just like it wakes you up in the morning.