Does creatine cause hair loss?

Creatine monohydrate is the most heavily studied supplement in the gym, and it still carries a reputation for making your hair fall out. That reputation traces back to one specific source: a small 2009 study that never once looked at hair. Here is what it actually said, what it did not, and what to do in practice.

Where the claim came from

In 2009, researchers in South Africa published a study on 20 young rugby players. The protocol ran 3 weeks: 20 g of creatine per day for the first 7 days (4 doses of 5 g), then 5 g per day for the next 14 days. The finding that still gets repeated: dihydrotestosterone (DHT) rose by roughly 56% after the loading week and stayed about 40% above baseline over the following two weeks. Total testosterone did not change meaningfully.

Three details that rarely travel with the headline:

• The sample was 20 people over 3 weeks — far too short to reveal anything about hair.
• Nobody looked at a single subject's hair. No photographs, no hair counts, no density measurement.
• The DHT values stayed inside the normal reference range. The rise went from the lower half of the range toward the upper half, not above it.

Why DHT matters at all

In androgenetic alopecia, follicles on the crown and temples are genetically sensitive to DHT. Each growth cycle gets shorter, each hair gets finer and lighter, and eventually the follicle miniaturises. The key word is genetically: without that inherited sensitivity, DHT does nothing to your hair. That is why some men with high DHT keep a full head of hair into their sixties while others with average levels have a visibly receding hairline at 25.

What happened after 2009

The finding was never replicated. Of the dozen or so controlled studies that measured testosterone alongside creatine, the large majority found no change at all. DHT has been measured directly in only a handful of trials, and none reproduced the same pattern. Across dozens of clinical studies covering thousands of subjects and durations up to 5 years, hair loss does not appear in the reported side effects.

Current state of the evidence: there is no study in which anyone measured hair density in people taking creatine and found it got worse.

Why people still connect the two

Mostly timing. Men typically start training seriously and taking creatine between 18 and 28, which is exactly when a genetically predisposed hairline starts moving. By age 50 roughly half of men have visible androgenetic alopecia, and for many it began a decade or more earlier.

The other reason is that several genuine hair stressors tend to show up in the same period as the creatine tub:

• Aggressive dieting. An 800-1000 kcal daily deficit and losing more than 1 kg per week can trigger telogen effluvium — diffuse shedding that starts 2 to 3 months after the stress and runs for several months.
• Low ferritin. Below 30 ng/mL hair often thins, especially in women and in people running 40+ km per week.
• Thyroid problems. Both overactive and underactive thyroid cause diffuse thinning, usually alongside fatigue and weight changes.
• Anabolic steroids. These accelerate androgenetic alopecia far more aggressively than anything else, and creatine is often the only supplement anyone admits to.

How to take creatine

1. Maintenance dose: 3-5 g of monohydrate per day, every day, including rest days. Above 90 kg bodyweight, treat 5 g as the floor.
2. Loading is optional. If you are in a hurry: 20 g per day split into 4 doses of 5 g for 5-7 days. Without loading you reach the same muscle saturation in 3-4 weeks.
3. Timing does not matter. Attach it to a meal you never skip, purely as a habit anchor.
4. Cycling and washout periods serve no purpose. If you stop, muscle levels return to baseline in about 4-6 weeks.
5. Expect +1 to +2 kg on the scale in the first two weeks. That is water inside the muscle cell, not under the skin.

If it still bothers you

Stop guessing in the mirror and measure. Photograph your crown and hairline under the same light, from the same position, with dry hair, every 8-12 weeks. Losing 50 to 100 hairs a day is normal, so a few strands on the pillow tell you nothing.

If you want a real test, drop creatine for 12 weeks and compare the photos. Realistic expectation: you lose 1-2 kg of bodyweight and 1-2 reps on sets of 6-10, and your hair does exactly what it was already doing, because it grows about 1 cm per month and responds to everything slowly.

When to see a doctor

• Shedding in clumps, or noticeably more than 100 hairs a day for longer than 6 weeks.
• Circular bald patches, or shedding with redness, itching, flaking or a painful scalp. That is not androgenetic alopecia and needs an exam.
• Hair loss together with fatigue, feeling cold, weight changes or irregular periods. Ask for a full blood count, ferritin, TSH and vitamin D.
• If you have kidney disease or take medication that stresses the kidneys, check with a doctor before starting creatine. Also mention that you take it when giving blood samples, since creatine can falsely raise measured creatinine.
• If thinning genuinely bothers you, there are treatments with proven effect. The earlier you start, the more hair you keep.

The short version

• The whole claim rests on one 2009 study of 20 people that tracked hormones for 3 weeks and never examined anyone's hair.
• No study since has shown creatine thinning hair, and hair loss does not appear among its reported side effects.
• Baldness is driven by inherited follicle sensitivity to DHT, not by a supplement. The age overlap with starting to train fools people.
• The practical dose is 3-5 g daily, every day; loading with 4 x 5 g for 5-7 days is optional and cycling is pointless.
• Sudden shedding, bald patches, an inflamed scalp, or hair loss with fatigue and weight changes means a doctor visit plus ferritin, TSH and a blood count.