Short answer: current evidence says no. A 2025 randomized controlled trial found that 5 g of creatine a day for 12 weeks did not change DHT, the hormone linked to male-pattern hair loss, and did not change hair measurements. The worry comes from a single 2009 study that never measured hair at all.
Bloating is a different story. Creatine does cause some water gain, and large doses can upset your stomach. Both are easy to manage once you know why they happen.
Where the hair-loss myth came from
Nearly every "creatine causes hair loss" claim traces back to one study: a 2009 trial in 20 college rugby players (van der Merwe et al., Clinical Journal of Sport Medicine). The players were loaded with 25 g/day for a week, then took 5 g/day. Their blood levels of DHT (dihydrotestosterone) rose by roughly 50% or more during loading and stayed above baseline during the maintenance phase.
DHT matters because, in people who are genetically prone to it, it shrinks hair follicles over time. That's how male-pattern baldness happens. So the headline wrote itself. But the study had big limits:
- It never measured hair. No one counted, photographed, or examined anyone's hair.
- DHT stayed within the normal range the whole time.
- Blood DHT isn't scalp DHT. What affects follicles is DHT activity in the scalp, which this study didn't measure.
- It was small and short: 20 people over 3 weeks.
- No one repeated it. In more than 15 years, no other study reproduced the DHT rise.
What the 2025 trial found
In 2025, researchers finally tested the question directly (Lak et al., Journal of the International Society of Sports Nutrition):
- Design: a randomized, placebo-controlled trial in healthy, resistance-trained young men.
- Dose: 5 g of creatine monohydrate a day for 12 weeks. That's the standard daily dose, with no loading.
- Measured: testosterone, DHT, the DHT-to-testosterone ratio, and several direct hair measurements.
- Result: no meaningful differences between the creatine and placebo groups in any hormone or any hair measurement.
It's the first trial built to answer the question, and it found no link.
What the trial can't tell us
To be fair, the study also had limits. It was relatively small and lasted 12 weeks. It studied only young men. And it excluded people who already had a hair-loss condition. So it shows creatine doesn't cause hair loss in healthy men over 3 months. It can't fully rule out an effect in people who are already losing hair, over many years.
If baldness runs in your family
There's no direct evidence that creatine speeds up genetic hair loss. But if you're already thinning, or you're worried about it, a sensible approach is:
- Stick to 3–5 g a day and skip loading. The only DHT signal ever reported came during a high-dose loading phase.
- Take a photo of your hairline and crown before you start, then compare every few months in the same lighting.
- If you use a hair-loss treatment, keep using it as prescribed. Creatine doesn't interact with common hair-loss treatments.
- Talk to a dermatologist if you notice faster shedding for any reason. Stress, illness, diet and thyroid problems are far more common causes.
Bloating and water weight: what's real
This side effect is real, but it's usually misunderstood.
Water inside the muscle (expected). Creatine pulls water into your muscle cells along with it. Most people gain about 0.5–1 kg (1–2 lb) in the first few weeks. This happens inside the muscle, not under the skin. It's part of how creatine works and tends to make muscles look fuller, not puffy. It levels off once your stores are full.
Puffy or bloated feeling (uncommon at normal doses). Some people notice a heavier, "watery" feeling, mostly during loading. Holland & Barrett notes that loading can cause a significant short-term increase in total body water that usually settles within a few weeks (Holland & Barrett).
Stomach bloating, cramps, or loose stools (dose-related). These mostly happen when people take a large amount at once, such as 10 g or more in a single dose during loading. Spreading the dose out, taking it with food, and sticking to 3–5 g a day usually prevents them.
How to avoid bloating
- Skip loading. 3–5 g a day reaches the same muscle stores in 3–4 weeks.
- Split larger doses. Take smaller amounts at different times of day, never 10 g or more at once.
- Take it with a meal if your stomach is sensitive.
- Mix powder well in at least 8 oz (about 250 ml) of liquid. Undissolved powder is harder on the stomach.
- Drink normally throughout the day.
Using gummies? See How Many Creatine Gummies Should You Take? for a no-loading dose plan.
Other side effects people ask about
Kidneys. In healthy people, research hasn't found kidney harm at recommended doses (Cleveland Clinic; ISSN position stand). Creatine does raise blood creatinine, a marker doctors use to estimate kidney function, so tell your doctor you take it before a blood test. If you have kidney disease, don't take creatine without medical advice.
Dehydration and cramps. This is a common myth. Studies in athletes haven't found more cramping or heat illness with creatine. Stay normally hydrated anyway.
Weight gain from fat. No. Creatine has almost no calories. The early gain on the scale is water in your muscles.
Acne. No good evidence links creatine to acne. The idea mostly borrows from the same DHT theory, which the 2025 trial didn't support.
Who should check with a doctor first
- People with kidney or liver disease
- Anyone pregnant or breastfeeding
- Anyone under 18
- Anyone taking medicines that affect the kidneys, such as some NSAIDs used daily, diuretics or lithium
Frequently asked questions
Does creatine raise DHT?
The only study that reported a rise (2009) found it stayed within the normal range. The more rigorous 2025 trial found no change in DHT at 5 g a day.
Will stopping creatine reverse hair loss?
There's no evidence that creatine causes hair loss, so stopping it isn't likely to change hair shedding. Persistent shedding has other causes worth checking with a doctor.
How long does creatine bloating last?
Water gain inside muscle levels off within a few weeks. Stomach bloating usually stops as soon as you reduce the dose or stop loading.
Is creatine safe for women?
Yes, for healthy adults at standard doses. Women are often more worried about water weight, which is modest and inside the muscle. See Creatine for Women Over 40.
Are gummies less likely to cause bloating than powder?
Only if they lead you to take smaller doses. At the same daily amount, the form doesn't matter much. See Creatine Gummies vs Powder.
The bottom line
The best evidence available, a 2025 randomized trial, found no link between creatine and hair loss. Water gain inside the muscle is normal and expected. Stomach bloating mostly comes from loading, and you can avoid it by taking 3–5 g a day. For the full picture on what creatine does, read Creatine Monohydrate Benefits.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for general information and isn't medical advice. Talk to your healthcare provider before starting any supplement, especially if you have a medical condition or take medication.