“Creatine can raise blood creatinine because creatinine is a breakdown product of creatine.”

Scalpelheads,

Creatine has spent decades being marketed beside men whose necks require their own postal codes. So naturally, many people assume it is a mysterious bodybuilding powder that causes instant swelling, kidney failure, and an uncontrollable desire to photograph chicken breasts beside a kitchen scale.

The inconvenient scientific reality is much less dramatic.

Your body already makes creatine from three amino acids: glycine, arginine, and methionine. It is not a steroid, a protein, or powdered masculinity. Most creatine is stored in skeletal muscle, where it helps rapidly rebuild ATP, the molecule your cells use for immediate energy.

Think of ATP as the cash in your pocket and phosphocreatine as the friend who quietly covers the bill before the waiter begins judging everyone.

This matters most during short, intense efforts such as lifting, sprinting, jumping, or repeatedly carrying every grocery bag in one trip because returning to the car would represent moral failure.

Creatine can help you perform slightly more work, recover between bursts, and gradually gain more strength and lean mass when combined with resistance training. It does not build muscle while you lie motionless watching renovation videos. The supplement assists training. It does not impersonate it.

Creatine may also pull some water into muscle cells. That can increase body weight, particularly when you first start taking it, but this is not body fat.

Your scale may report a small increase because scales are emotionally detached accountants with no interest in context. The water is mainly associated with muscle tissue, not a secret overnight conversion into a human water balloon.

Your brain also uses creatine for energy buffering. Research suggests possible benefits for memory, attention, and mental performance, particularly during sleep deprivation, aging, or other high-demand conditions.

Promising, yes. A replacement for sleep, no.

Taking creatine after four hours of sleep does not transform you into a productivity eagle. It may simply make the exhausted pigeon slightly better at spreadsheets.

Creatine can raise blood creatinine because creatinine is a breakdown product of creatine. Since creatinine is used to estimate kidney filtration, supplementation can sometimes make the laboratory estimate look worse without proving kidney damage.

Studies in healthy adults generally have not found impaired kidney function from recommended doses. Still, anyone with kidney disease, reduced kidney function, or medications that can affect the kidneys should speak with a clinician before taking it.

Tell your clinician you use creatine before interpreting bloodwork. Cystatin C or other assessment methods may sometimes help clarify the picture.

Choose creatine monohydrate.

Take 3 to 5 grams every day. Timing matters far less than consistency.

Loading with 20 grams daily, divided into four doses for five to seven days, can saturate your muscles faster. However, loading is optional and more likely to make your stomach file a formal complaint.

Drink normally. You do not need a sacred gallon jug, a cycling calendar, or “ultra-alkaline volcanic creatine crystals” harvested during a lunar eclipse.

Creatine is not a fat burner, brain transplant, or substitute for exercise. It is simply a well-studied tool that helps cells manage rapid energy demands.

Annoyingly reasonable.

Terrible news for the supplement industry’s costume department.

Until next Saturday,

Kevin Cutthebull, MD