The Truth About Creatine: Hair Loss, Kidney Health, and Other Myths

Creatine is one of the few supplements I actually recommend without much hesitation – but it's also one of the most misunderstood.

You've probably heard everything from "it'll make you bald" to "it'll wreck your kidneys" to "it's basically a mild steroid."

In this article, I want to strip away the drama and explain what creatine really does, what the research actually shows, and where the common myths come from.

We'll keep the language simple first, then layer in the science and key studies so you know exactly what you're putting in your body.

What Is Creatine?

Creatine is a compound your body makes from amino acids (arginine, glycine, methionine) in the liver and kidneys, and it's also found naturally in meat and fish.

Most of the creatine you store is in your muscles, where it sits as phosphocreatine – a small energy reserve for hard, short bursts of effort.

When you supplement with creatine (usually 3–5 g/day), you're simply topping up this natural store so your muscles have more fuel ready for intense work.

Creatine is not a hormone, not a steroid, and has a totally different chemical structure from anabolic steroids.

How Creatine Works

Think of ATP as your muscle's "quick-charge battery" – it's the immediate fuel your cells burn when you sprint, jump, or lift heavy.

During hard efforts, ATP is used up fast and turns into ADP, which on its own can't power contractions for long.

Phosphocreatine steps in and donates a phosphate back to ADP, rapidly turning it into ATP again so you can keep pushing for a few more reps or seconds.

Supplementing creatine increases the amount of phosphocreatine in your muscles, so you regenerate ATP faster and sustain high-intensity work a bit longer.

Why Creatine Helps Strength, Performance, and Muscle Gain

Over weeks and months, that "few extra reps" effect adds up to more total training volume – more high-quality work done with decent loads.

More productive volume is one of the key drivers of strength and muscle growth, which is why creatine repeatedly shows small but meaningful improvements in lean mass and performance.

The International Society of Sports Nutrition calls creatine monohydrate the most effective ergogenic supplement available for increasing high-intensity exercise capacity and lean body mass in athletes.

Beyond athletes, research also supports benefits in older adults and some clinical populations for strength, function, and fatigue, again at typical doses around 3–5 g/day.