How Does Topical Caffeine Help with Hair Loss?

Caffeine is a surprisingly common substance. In fact, more than 60 different plant species produce caffeine. People have been consuming caffeine in forms like coffee, tea, or chocolate for thousands of years, and studies suggest that regular consumption can have health benefits like reducing the risk of dementia, cancer, and diabetes.

Caffeine’s long history of use, low toxicity, and potential health benefits are desirable qualities. But does it actually help with hair loss? Several studies have shown that it does. In the lab, caffeine has been found to enlarge hair follicles and lengthen their growth phase.

When used for hair loss, caffeine is usually applied topically (in shampoos or lotions). This delivers high doses directly to the hair follicles without affecting the rest of the body. Multiple studies have shown that using caffeine on the scalp can reduce hair loss and increase hair thickness after six months of daily use.

What are the Effects of Caffeine on Hair Follicles?

In one study, individual hair follicles from 14 men were transplanted into a lab setting. These follicles were exposed to testosterone, which is known to reduce hair growth (testosterone or its derivative, DHT, is a major cause of hair loss in men and possibly women). As expected, the follicles exposed to testosterone showed reduced growth.

When caffeine was added to the mix, it blocked the negative effects of testosterone, allowing the follicles to grow at a higher rate. In fact, follicles exposed only to caffeine grew faster than those left untreated, showing that caffeine promotes hair growth.

How Does Caffeine Affect Hair Growth?

Every hair follicle goes through phases—growth and rest. During the growth phase, new hair is produced, and in healthy hair, this phase can last for years. After the growth phase, hair falls out and the follicle enters a resting phase before starting to grow again.

In people with pattern hair loss, the growth phase shortens while the resting phase lengthens. To combat hair loss, we need to extend the growth phase. Studies show that caffeine affects the signaling molecules that regulate hair follicles, encouraging them to stay in the growth phase longer, which reduces hair loss.

Is Caffeine Effective for Hair Loss?

Studies have shown that topical caffeine significantly reduces hair loss and improves hair strength and thickness. These results have been observed by both investigators and participants, indicating strong and consistent effects. Caffeine has also been found to be effective for women with pattern hair loss, showing similar improvements after six months of use.

Why Is Caffeine Used Topically for Hair Loss?

Caffeine is applied topically (in shampoos and lotions) because the dose needed to stimulate hair growth is much higher than what you’d get from drinking coffee. You’d need to drink dozens of cups of coffee to have any effect on your hair follicles, which would cause severe side effects. Applying caffeine directly to the scalp is a much safer option.

Caffeine is a small molecule, which allows it to easily penetrate the scalp and reach the hair follicles. Studies have shown that applying a caffeine-containing shampoo for just two minutes allows significant amounts of caffeine to enter the scalp, and it remains detectable for up to 24 hours. Regular use can maintain this level, making caffeine an effective treatment for hair loss.

How Does Topical Caffeine Compare to Other Hair Loss Treatments?

There are a few other effective treatments for hair loss, like finasteride and minoxidil. Both can be used topically or orally. In one study comparing caffeine with minoxidil, both treatments showed similar results in increasing hair growth, reducing hair loss, and improving hair thickness. This suggests that caffeine could be a good alternative for those seeking a more natural option.

Caffeine can also be used alongside other treatments to increase their effectiveness. If you’re considering a hair loss treatment, it’s a good idea to consult a dermatologist to help decide the best option for you.