Is Coffee Good for Hair Growth? Separating Myth From Evidence
Share
Is coffee good for hair growth? The honest answer has two parts. Drinking coffee has not been shown to make hair grow, thicken or stop falling out. Applying caffeine directly to the scalp, usually in a lotion or shampoo, is a different question, and there the evidence is more interesting: lab studies and a small set of clinical trials suggest it may help some people with hair loss, though the research is still limited in quality.
This guide separates the three things people usually mean by “coffee for hair”: drinking it, rinsing hair with brewed coffee, and using caffeine products made for the scalp.
Key takeaways
- No good evidence shows that drinking coffee affects hair growth.
- A 2007 lab study found caffeine counteracted testosterone’s growth-suppressing effect on hair follicles taken from men with pattern hair loss.
- A 2025 systematic review of nine clinical trials found results favoring topical caffeine, but most of the evidence was rated low or very low quality.
- Brewed coffee rinses have not been tested for hair growth in clinical trials.
- Sudden, patchy or heavy hair loss deserves a visit to a doctor or dermatologist.
In this article
- Does drinking coffee help hair grow?
- What the lab studies found
- Is coffee good for hair growth when applied? The clinical trials
- Do coffee hair rinses work?
- Myth vs evidence at a glance
- FAQ
Does drinking coffee help hair grow?
There is no solid evidence that it does. The research on caffeine and hair focuses on products applied to the scalp, where caffeine can reach hair follicles in concentrated form. The 2025 review discussed below looked only at topical products and did not cover coffee drinking at all.
It also makes sense biologically that the two are different. When you drink coffee, caffeine is absorbed into your bloodstream and spread throughout the body, so the amount reaching scalp follicles is not comparable to a lotion applied directly to them. Nobody has shown that a daily mug or two changes hair growth, and drinking more coffee to chase that idea only adds caffeine. For most healthy adults, agencies such as the FDA and EFSA consider up to 400 mg of caffeine a day acceptable.
What the lab studies found
The idea that caffeine might help hair comes largely from a 2007 study by Fischer, Hipler and Elsner in the International Journal of Dermatology. The researchers took hair follicles from scalp biopsies of men with androgenetic alopecia (male pattern hair loss) and kept them alive in culture for several days.
- Testosterone added to the culture significantly suppressed follicle growth.
- Caffeine at very low concentrations (0.001% and 0.005%) counteracted that suppression.
- Caffeine alone also stimulated follicle growth in the dish.
That is a meaningful lab result, but it is not proof that a product works on a living scalp. Follicles in a dish are not affected by blood flow, hormones across the whole body or how well a product penetrates skin. Lab findings are a starting point for clinical trials, not a substitute for them.
Is coffee good for hair growth when applied? The clinical trials
In 2025, researchers at Jagiellonian University Medical College in Kraków published a systematic review in the journal Healthcare. From 1,121 screened articles, they found nine clinical trials of caffeine hair products with 684 participants in total.
| What they found | Detail |
|---|---|
| Direction of results | All nine studies favored caffeine-containing products |
| Strongest single trial | An open-label randomized trial in 210 men found a 0.2% caffeine solution performed comparably to 5% minoxidil |
| Quality of evidence | Medium in 3 studies, low in 1, very low in 5 |
| Study design | Only 2 were randomized, double-blind trials with proper controls |
| Who was studied | Mostly men; women were only about 4% of participants |
| Length | 2–6 months, short for hair research |
| Caffeine dose | Disclosed in only 2 of the 9 studies |
The authors described topical caffeine as safe and effective against hair loss, but they also stressed the need for better-designed studies and cautioned that results are not guaranteed. A fair reading: topical caffeine is promising and appears low-risk, but the evidence is thin, mostly in men, and far from conclusive.
The proposed mechanism involves caffeine blocking the adenosine pathway and raising a messenger molecule called cAMP, which may boost metabolic activity in hair follicles. Most of that mechanistic evidence also comes from lab and animal work.
Do coffee hair rinses work?
Coffee rinses, where cooled brewed coffee is poured through the hair and left on for a while, are popular on social media. People use them for shine or to deepen brown tones. No clinical trial has tested a brewed coffee rinse for hair growth, and a cup of coffee is not the same as a formulated product designed to stay on the scalp. If you enjoy a rinse, treat it as a cosmetic experiment: use cooled coffee, patch-test first, and be aware it can stain light hair, towels and grout.
Used grounds are also a common DIY scrub ingredient, which we cover in our coffee scrub guide. Keep scalp scrubbing gentle; coarse particles can irritate sensitive skin.
Myth vs evidence at a glance
| Claim | Verdict |
|---|---|
| Drinking coffee makes hair grow faster | Not supported by evidence |
| Caffeine stimulates hair follicles in the lab | Supported by in vitro research |
| Caffeine shampoos and lotions reduce hair loss | Promising, but based on few, mostly low-quality trials |
| A coffee rinse regrows hair | Untested |
| Coffee causes hair loss | No good evidence for this either |
For more caffeine claims that do not hold up, see our roundup of caffeine myths.
When to see a doctor
Hair loss has many causes, including genetics, hormones, thyroid conditions, iron deficiency, stress, illness and some medications. A dermatologist can identify the cause and discuss treatments with stronger evidence. See a professional promptly if hair loss is sudden, patchy, comes with scalp pain or redness, or follows a new medication.
Enjoy your coffee for what it is
Coffee will not replace a hair care routine, but it can still be a great part of your day. If you want flavor without a late-day caffeine load, our Peru Decaf is decaffeinated with the Swiss Water Process, and our Breakfast Blend is a smooth, nutty medium roast for mornings. Browse our best sellers for more.
FAQ
Is coffee good for hair growth if I drink it?
There is no reliable evidence that drinking coffee improves hair growth. Research on caffeine and hair focuses on products applied directly to the scalp.
Does caffeine shampoo really work?
Some small trials suggest caffeine shampoos and lotions may help with pattern hair loss, but most of the evidence is low quality. Results vary and are not guaranteed.
Can coffee cause hair loss?
No good evidence links normal coffee drinking to hair loss. If you are losing hair, look for other causes with a doctor.
How long should I leave a coffee rinse on my hair?
There is no evidence-based time because rinses have not been studied for growth. If you try one for shine or color, patch-test first, keep it short and rinse well.
Is caffeine as good as minoxidil?
One open-label trial in men found similar results, but it was not blinded. Talk to a dermatologist before swapping any treatment.
Sources
- Fischer TW, Hipler UC, Elsner P. Effect of caffeine and testosterone on the proliferation of human hair follicles in vitro. International Journal of Dermatology, 2007.
- Szendzielorz E, Spiewak R. Caffeine as an Active Ingredient in Cosmetic Preparations Against Hair Loss: A Systematic Review of Available Clinical Evidence. Healthcare, 2025.
Facts checked in October 2026.
This article is for general information only and is not medical advice. If you have a health condition, are pregnant or take medication, ask your doctor before changing your caffeine intake.
Keep reading: Benefits of caffeine · Uses for coffee grounds · Blend