Research shows that treatments including caffeine are effective at slowing hair loss. This is believed to be because caffeine can help block DHT and even research its effects.
Starting in the early 2000s, several studies have been performed on using caffeine both alone and with other ingredients to treat androgenetic alopecia (male pattern baldness). The results strongly suggest that treatments including caffeine, such as Revita Shampoo and Spectral DNC-N, are highly effective.
In addition to blocking DHT, caffeine is an effective anti-inflammatory. Although you likely associate caffeine primarily with the cup of coffee or tea you drink in the morning, it is a powerful health ingredient. Furthermore, caffeine can help improve blood flow. This is associated with stimulating the growth of new hairs. Caffeine extends the life cycle of hair follicles, allowing them to grow more hair.
Counterintuitively, the caffeine you drink may promote hair loss. However, when applied topically, it can block DHT.