Caffeine-infused shampoos are designed to combat hair thinning. The theory is that caffeine can block DHT, a hormone linked to hair loss, and stimulate hair follicles directly when applied topically. Users wash with these shampoos, allowing a few minutes for the scalp to absorb the caffeine before rinsing, aiming to promote stronger, healthier hair growth over time with consistent use. https://febron.com/products/caffeine-shampoo-c8-formula