Creatine Isn't Just for Muscles Anymore: What the Research Says About Brain Health

Quick question: what comes to mind when you hear the word creatine? If you pictured a bodybuilder with a giant shaker bottle, you are not alone. But some of the most exciting research right now is happening above the neck.

I recently finished my longevity coach certification, and healthy aging has become a real passion of mine. I take creatine to support my muscle strength and workouts, but what really has me hooked is the growing research on brain health, memory and mental fatigue. So let's dig in.

Think of creatine as a battery charger

Here is the simple version. Creatine helps your cells make quick energy, a bit like a battery charger for your body. Your body makes some on its own, and you get more from foods like meat and fish. Most of it hangs out in your muscles, but your brain taps into it too, and your brain is one of the hungriest energy users you have. That is why researchers started asking what happens when we top it off.

Your memory might thank you

Let's start with the fun part. In 2023, a review in Nutrition Reviews pulled together 8 randomized controlled trials and found that creatine improved memory scores compared with placebo. The boost was strongest in adults ages 66 to 76, which researchers think may be because brain creatine levels dip as we age.

Before we all rush to the supplement aisle, a reality check: the science is not a slam dunk yet. Another analysis, published in Frontiers in Nutrition in 2024, found benefits for memory, attention time and processing speed, but not for overall cognitive function or executive function. Studies also vary in dose, length and the tests they use, so the experts are calling for bigger and longer trials.

Alzheimer's: exciting but early

This is the part that gets researchers buzzing, and also the part where I want to keep my feet on the ground. At the University of Kansas Medical Center, researchers ran a small pilot study with 19 people with Alzheimer's disease, ages 60 to 90. Participants took 20 grams of creatine daily for 8 weeks, far more than the 3 to 5 grams most people take. Brain creatine levels rose and some measures of memory and attention improved.

But there was no placebo group, so it is much too soon to say creatine can help prevent or treat Alzheimer's disease. What the study does do is give scientists a good reason to run bigger trials.

Midlife women, this one is for you

If you are approaching or going through menopause, creatine gets even more interesting. As estrogen drops, muscle and bone loss pick up speed, and creatine paired with strength training may help push back. In a 2-year placebo-controlled study of 237 postmenopausal women, reported by NutraIngredients, the creatine group showed improvements in bone geometry compared with placebo.

The secret ingredient is the weights. Researchers note that the muscle and bone benefits appear to depend largely on pairing creatine with resistance exercise, so think of creatine as the sidekick and strength training as the hero. As for brain fog, research on creatine and cognition during the menopause transition is still early, and small studies so far have had mixed results.

How to try it

If you are curious, here is how to get started:

• Choose creatine monohydrate. It is the most researched form, so a plain, unflavored powder is all you need.

• Start with 3 grams daily. Most research-backed routines use 3 to 5 grams per day.

• Stir it into something you already drink. Water, a smoothie or a protein shake all work. Consistency beats timing, and rest days count too.

• Be patient. At 3 grams a day, your muscle stores gradually fill over about 4 weeks, so you can skip the loading phase some products recommend.

• Give your doctor a heads-up. Creatine can raise creatinine on blood tests without signaling kidney damage, so mention it before any lab work.

• Lift something. Muscle and bone benefits are strongest when creatine goes together with resistance exercise.

Is it safe?

For healthy people at recommended doses, the evidence is reassuring. The International Society of Sports Nutrition reviewed the research and found no sign that creatine harms kidney or liver function. Still, check with your health care provider before starting, especially if you have kidney disease or other medical concerns. Research during pregnancy and postpartum is very limited, so ask your provider first if that applies to you.

Bonus tip: supplements are not reviewed by the FDA before they reach the shelf, so look for products tested by a third party.

My takeaway

For me, longevity is not just about living longer. It is about keeping the physical and mental strength to do the things we love for years to come. Creatine is one small piece of that puzzle, and it works best alongside strength training, good sleep and the people who keep us moving.

So go ahead and stir a scoop into your morning smoothie. Your muscles will thank you, and your brain just might too.