Caffeine Hair Products Claim to Boost Growth, But Do They Work?

Experts weigh in on the benefits and risks of using caffeine-infused haircare.

Apr. 18, 2026 at 1:30pm

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A minimalist illustration of a human head defined by vibrant neon lines representing the hair follicles and strands, conceptually depicting the energizing effects of caffeine on the scalp.Caffeine's potential to stimulate hair follicles and improve scalp health has made it a popular ingredient in haircare products, though experts disagree on its efficacy.NYC Today

Haircare brands are touting caffeine as an effective hair growth stimulator in shampoos, conditioners, and other treatments. Dermatologists and trichologists offer their expert opinions on whether caffeine can actually help with hair growth, the potential benefits, and any side effects to be aware of.

Why it matters

As consumers seek solutions for hair loss and thinning, caffeinated haircare products have become a popular trend. Understanding the science behind caffeine's effects on the hair and scalp can help people make informed decisions about incorporating these products into their haircare routines.

The details

Some research suggests caffeine may have stimulatory effects on hair follicles and could potentially improve circulation to the scalp, potentially aiding hair growth. However, experts are divided on the efficacy of caffeine for hair growth, with one trichologist saying there is "no real evidence" that caffeine delivers those benefits, though it may provide antioxidant advantages. Potential side effects of overusing caffeine-infused products include scalp dryness, irritation, and hair discoloration.

  • The research on caffeine's effects on hair growth has been ongoing for several years.

The players

Dendy Engelman, MD

A board-certified dermatologist in New York City who believes research shows caffeine may stimulate hair growth and improve scalp health.

Kerry E. Yates

A trichologist and founder of the Colour Collective who is skeptical about caffeine's ability to directly promote hair growth, though she acknowledges its antioxidant benefits.

Jodi LoGerfo

A dermatologist with the Orentreich Medical Group in New York City who says caffeine's stimulatory effects could potentially aid hair growth by improving circulation and oxygen delivery to follicles.

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What they’re saying

“Caffeine by nature is a stimulant that increases circulation, which could have the capacity to bring nourishment to the hair follicles. It also may have the possibility to deliver more oxygen, which could increase cellular growth.”

— Jodi LoGerfo, Dermatologist

“Caffeine is purported to stimulate the follicle, and some brands will even talk about how the addition of caffeine will lift the individual strands, improving volume. There is no real evidence that caffeine delivers hair growth or hair volumizing benefits. With that being said, caffeine does provide antioxidant benefits, which will help maintain a healthy scalp.”

— Kerry E. Yates, Trichologist and Founder, Colour Collective

“Research has shown that caffeine may have multiple benefits for the hair. Studies provide evidence that caffeine is a stimulator for hair growth, which has been found in a study of patients with alopecia. Additionally, caffeine has improved the barrier function in the scalp of individuals, which can help lead to overall scalp and hair health.”

— Dendy Engelman, MD, Board-Certified Dermatologist

What’s next

More research is needed to conclusively determine the efficacy of caffeine for hair growth, but experts suggest using caffeine-infused products in moderation to avoid potential side effects.

The takeaway

While the jury is still out on whether caffeine can directly stimulate hair growth, the ingredient may provide antioxidant benefits that support overall scalp and hair health. Consumers should exercise caution and moderation when using caffeine-infused haircare products.