Have you tried caffeine shampoo, but been left disappointed by the results? A doctor is here to reveal whether its effectiveness is actually a "myth".
Caffeine shampoo has become a common item in supermarkets and pharmacies in recent years. It's designed to stimulate hair growth using caffeine extract.
The first caffeine shampoo on the market appeared in stores following a study in 2007. This study showed that caffeine stimulates hair follicles to regrow in a laboratory dish, leading researchers to develop a shampoo aiming to replicate this effect on the human scalp.
LloydsPharmacy previously analysed all negative reviews of four brands of caffeine shampoo on Amazon. They found that 41% of users reported them as ineffective in stimulating hair growth.