Is creatine worth it? What the research says about strength, muscle and the scale

By Peter Kohout, strength & conditioning coach Based on published research Updated November 4, 2026

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Short answer

Yes, if you lift. Creatine monohydrate has been studied for decades, and the result keeps coming back the same: lift weights while taking it and you build a bit more muscle and strength than you would from lifting alone. That holds for people in their 20s and people in their 60s. If you don't train, it does very little. Take 3 to 5 g of plain powder every day and buy one with an independent testing seal. The scale may tick up in the first week. That's mostly water stored in your muscles, and it settles.

What creatine does

Your muscles keep a small store of creatine and use it to make energy quickly during short, hard efforts, like the last few reps of a heavy set. A daily dose fills that store, which lets you do slightly more work each session. Over weeks, the extra work turns into extra strength and muscle.

So the training is doing the work and creatine is helping at the margins. A 2024 review of 143 studies found bigger changes in body composition when people also did strength training [3].

What the research shows

Each row below pools many randomized trials that compared creatine plus lifting with a placebo plus lifting.

Who was studied	What creatine added
Adults 50 and over who lifted 2 or 3 times a week (22 trials, 721 people)	About 1.4 kg (3 lb) more lean mass, and stronger on the chest press and leg press [1]
Adults under 50 who lifted (12 trials, 266 people)	Body fat 1.2 percentage points lower, with no difference in kilograms of fat [2]
All ages, some training and some not (143 studies)	About 0.9 kg heavier, nearly all of it fat free mass; body fat 0.3 points lower [3]

Those are modest numbers. A few extra pounds of muscle over several months is worth having, but it won't change how you look by itself. The lower body fat percentage in younger adults mostly comes from the added muscle; the actual amount of fat barely moved [2]. If your training is inconsistent or your protein is low, sort those out first. Think of creatine as a small bonus on top of habits that are already working.

Why the scale may go up

The most common side effect is extra water stored in your muscles during the first few days, and it's most noticeable when people "load" with about 20 g a day. Studies that ran longer found no lasting rise in body water relative to muscle [4], and creatine doesn't add fat [2].

Where this trips people up is weight tracking. If you weigh in daily to check your calories, a jump in week one can look like you're overeating when you aren't.

Three things keep your numbers honest:

Skip the loading phase. At 3 to 5 g a day your muscles fill more slowly, and the scale moves more slowly with them [5].
Start in an ordinary week, not the week you change your calories, so you can tell the two effects apart.
Judge your weekly average over two or three weeks, not any single morning. TDEE Tracker's weight trend line does that smoothing for you.

How to take it

Dose: 3 to 5 g a day, roughly 0.1 g per kg of body weight [4].
Loading: optional. About 0.3 g per kg a day for 5 to 7 days fills your muscles faster, but you get to the same place in 3 to 4 weeks without it [5]. We'd skip it for the scale reasons above.
Timing: doesn't seem to matter much [6]. Stir it into a shake, coffee or water, whenever you'll remember.
Form: plain creatine monohydrate powder, the form most of the research used [5]. Gummies are a gamble: in 2024 a supplement maker tested 12 gummy brands in its own lab and found nearly half had far less creatine than the label said [7].

Talk to a doctor first if…

You have kidney disease or reduced kidney function [5], or you take medicine that affects your kidneys.
You're pregnant or breastfeeding.
You're under 18. This guide is written for adults.

Mention it before any blood test, too. Creatine can raise creatinine, a marker doctors use to check your kidneys, even when your kidneys are fine [4].

Who should skip it

If you don't do any strength training, the effect is smaller [3] and your money is better spent elsewhere. It also won't help you lose fat. Your calorie target handles that. And if you're short on protein or sleep, fix those first, because they'll make a bigger difference than any supplement.

The two creatines we'd pick

Both give you the full 5 g of creatine monohydrate per serving. Pick based on whether you want it flavored and how much the testing matters to you.

Our pick

THORNE Creatine

Micronized monohydrate powder · Unflavored · 5 g per scoop · 180 servings · NSF Certified for Sport

Creatine monohydrate and nothing else, which is the form the studies used. It's NSF Certified for Sport, an independent program that checks the label and screens for banned substances. It has no taste, so it vanishes into coffee or a shake.

Skip it if you plan to drink creatine on its own in water and want it to taste like something.

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If you want it flavored

Optimum Nutrition Micronized Creatine

Micronized monohydrate powder · Blueberry lemonade · 5 g creatine per serving, about 1 rounded teaspoon (no scoop included) · 60 servings

The same 5 g of creatine monohydrate per serving, with a blueberry lemonade flavor so you can drink it straight in water.

Skip it if you want nothing but creatine in the tub. The flavoring adds other ingredients, so check the label for sweeteners and calories.

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Honestly, any plain creatine monohydrate with an independent seal (NSF, Informed Sport or USP) will work the same in your muscles. The choice comes down to taste, testing and how easy it is to take every day.

Get the basics right first

Find your calories and protein target

Creatine works best when your protein and calories are already right. The calculator gives you both in about 20 seconds.

Calculate my macros

Struggling to hit your protein? Our Egg & Turkey Stuffed Peppers have 43 g of protein for 329 calories, and one batch covers four breakfasts.

Common questions

Does creatine work for women?

Yes. Reviews of the research find it works in women as well [4]. The dose is the same, 3 to 5 g a day.

Do I need to cycle off creatine?

No. Studies have used it daily for up to five years with no safety problems, and long-term use doesn't appear to shut down your body's own creatine production [5].

Will creatine make me look bloated?

The extra water is stored inside your muscles rather than under your skin, and it shows up mostly in the first few days if you load [4]. Skip loading and the change comes on more gradually.

About this guide. Based on the peer-reviewed research listed below. It is general information for healthy adults, not medical or nutrition advice, and it hasn't been reviewed by a doctor or registered dietitian. Supplements aren't approved by the FDA before sale. Talk to your doctor before starting any supplement if you have a medical condition or take medication. Medical disclaimer.

Written by Peter Kohout, strength & conditioning coach