Six things people still get wrong about creatine

Creatine is one of the most studied supplements there is, and still carries more folklore than almost anything else on the shelf. Most of it dates from an era of 20 g loading weeks, cheap bulk powder and gym-forum advice. Here are the six we hear most, answered with numbers rather than reassurance.

1. "It will make me bulky"

Size comes from years of heavy lifting and eating in a surplus. It does not come from 5 g of creatine. Creatine has no hormonal effect: it is not a steroid, it is a compound your liver already makes and your food already contains.

What people actually notice is strength in short, hard efforts and better recovery between sessions. Muscles can look slightly fuller because they hold a little more water inside the cell. Fuller is not larger.

2. "I will bloat and gain weight"

The puffy feeling has a specific origin: loading protocols. Twenty grams a day for a week moves water into the muscle abruptly, and that is the bloating story that stuck.

At 5 g a day with no loading, the same stores fill over three to four weeks. The scale can show up to about a kilo in that period. It is water inside the muscle cell, not under the skin and not fat. The 2021 review by Antonio and colleagues looked at the long-term data and found no consistent rise in the water outside the cells, which is the kind that shows as bloat. In women the effect tends to be smaller than the numbers reported in men.

3. "It is hard on the kidneys"

This one comes from a misunderstanding of a blood test. Creatine breaks down into creatinine, and creatinine is what doctors measure to estimate kidney function. Take creatine and the number can read slightly higher without anything happening to the kidney. If you get bloodwork done, tell your doctor you take it.

The safety data is large. A 2025 analysis of 685 clinical trials found side effects reported at the same rate in the creatine groups as in the placebo groups. A separate meta-analysis of 951 women found no differences in gut, kidney, liver or heart measures. Healthy kidneys handle the recommended dose without trouble. If you have a kidney condition, ask your doctor first, as with any supplement.

4. "It causes hair loss"

The worry traces back to a single 2009 study of 20 male rugby players that measured a hormone (DHT) during a loading protocol. It never measured hair.

The only trial to look at hair directly was published in 2025: 45 men, 5 g a day for twelve weeks, with hair density and thickness measured before and after. No rise in DHT, no change in hair. That is the whole evidence base, and it points one way.

5. "You have to load it and cycle it"

Neither. Loading is faster, not better: 3 g a day for 28 days reaches the same saturation as a loading week. And there is no evidence that muscle stops responding or that stores need a break. Take it daily, rest days included, and it keeps working. Stop, and levels drift back to baseline over about a month. We wrote a longer piece on this: Skip the loading phase.

Timing is the small cousin of this myth. Pre-workout, post-workout, morning, night: the differences in the research are tiny and inconsistent. What matters is that the daily dose happens every day.

6. "It is a gym-bro thing"

Creatine's reputation was built in the weight room, but the body does not care where you use it. Two facts make it especially relevant for people who never planned to lift:

• Women make about 20% less creatine than men and eat 30 to 40% less of it, so they start from lower stores.
• The newest research is not about the bench press. It is about short nights, the week before a period, mood, and midlife.

Runners, cyclists and padel players use the same short, hard efforts as a lifter, just spread across a longer session. And anyone who eats little or no meat or fish starts with low stores by default, because food is the only other source.

The short version

Five grams a day. No loading, no cycling, no timing rules. Give it a month before you judge it, and tell your doctor if bloodwork is coming up. One stick a day, every day.

Sources

1. Antonio J, et al. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr. 2021;18:13. jissn.biomedcentral.com
2. Kreider RB, et al. Safety of creatine supplementation: analysis of the prevalence of reported side effects in clinical trials and adverse event reports. J Int Soc Sports Nutr. 2025. pubmed.ncbi.nlm.nih.gov/40198156
3. de Guingand DL, et al. Risk of adverse outcomes in females taking oral creatine monohydrate: a systematic review and meta-analysis. Nutrients. 2020;12(6):1780. pmc.ncbi.nlm.nih.gov/articles/PMC7353222
4. Does creatine cause hair loss? A 12-week randomized controlled trial. J Int Soc Sports Nutr. 2025. pubmed.ncbi.nlm.nih.gov/40265319
5. Hultman E, Söderlund K, Timmons JA, et al. Muscle creatine loading in men. J Appl Physiol. 1996;81(1):232–237. pubmed.ncbi.nlm.nih.gov/8828669
6. Smith-Ryan AE, et al. Creatine in women's health: bridging the gap from menstruation through pregnancy to menopause. J Int Soc Sports Nutr. 2025;22(1):2502094. tandfonline.com