Is creatine safe? What the research actually says

Creatine has a strong research record for short, repeated, high-intensity efforts. It also has a long list of rumors attached to it.

The useful question is specific: what does research tell us about creatine monohydrate, at studied doses, in healthy adults?

What you can reasonably expect

Creatine helps replenish the energy used for brief, hard efforts. Alongside resistance training, it can support improvements in strength and muscle development. It still requires the training. It is not a stimulant, and an immediate buzz is not how you judge it. [1]

Kidneys: keep the context

Research generally supports creatine's safety in healthy adults at studied doses. That does not make it suitable for every medical situation. If you have kidney disease or an abnormal kidney test, discuss supplementation with your clinician. Tell them what you take before interpreting blood work. [2]

A label, an influencer or a blog cannot interpret your personal lab results. Keep that decision with someone who knows your health history.

What about hair loss?

A 2025 randomized trial directly examined this question. Resistance-trained men took 5 g of creatine monohydrate or a placebo daily for 12 weeks. Among the 38 participants who completed the study, researchers found no significant differences between groups in DHT or the measured hair outcomes. [3]

That is useful evidence against the rumor. A small, 12-week study does not prove zero risk for every person over every length of time. It does mean the claim that creatine has been shown to cause hair loss overstates the evidence.

Water weight and stomach comfort

Creatine can increase body water and scale weight. The amount varies, so do not read every early scale change as fat gain or new muscle. Loading can make the change happen faster. You can skip loading and use a regular daily dose instead. [1]

If a supplement consistently upsets your stomach, reassess the amount, the directions and the other ingredients instead of forcing it.

A straightforward routine

A common maintenance approach is 3–5 g of creatine monohydrate daily. Loading is optional; without it, building muscle creatine stores takes several weeks. Pick a routine you can repeat, including on rest days. [1]

Hollow Labs Creatine Monohydrate contains one ingredient and 5 g per scoop. If you already use another creatine-containing product, count that amount too.

Read the Creatine Monohydrate label.

Sources

1. Australian Institute of Sport: Creatine.
2. NIH Office of Dietary Supplements: Exercise and athletic performance.
3. Lak et al. Does creatine cause hair loss? A 12-week randomized controlled trial, 2025.