Creatine After 50: The Most Underrated Supplement for Ageing Well

Creatine is the most studied, most underrated supplement for anyone over 50. The evidence that it helps you hold on to muscle and strength as you age is strong, the emerging signal for memory and thinking is genuinely interesting, and the kidney fears that put people off are, for healthy kidneys, largely a misunderstanding of a blood test. It is also cheap and, on the safety data, reassuringly boring.

Why does creatine matter more after 50?

Because from roughly your forties onward you lose muscle and strength year on year, and that decline, sarcopenia, is one of the biggest drivers of frailty, falls and lost independence later in life. Creatine works directly against it.

Creatine helps your muscles regenerate energy during short, hard efforts, which lets you train a little harder and recover a little better. Paired with resistance training, that adds up. A 2017 meta-analysis pooling trials in older adults found that adding creatine to a resistance-training programme produced significantly greater gains in lean muscle mass and in both upper- and lower-body strength than training alone [1].

Read that again: it is not a substitute for lifting. It is a multiplier on the lifting you are already doing. The people who benefit are the ones who also pick up the weights.

The part nobody expected: your brain

Here is where it gets interesting. Your brain uses a lot of energy, and creatine is part of the cell's energy system there too. That has led researchers to test whether it does anything for cognition, and the early results lean positive.

A 2022 meta-analysis of randomised trials found creatine supplementation improved measures of memory in healthy people, with the effect most pronounced in older adults [2]. A broader 2024 review of creatine and cognition reached a similar cautious conclusion: a real signal, particularly for memory and under conditions of stress or sleep deprivation, alongside a call for larger trials [3].

We will be honest about the tier here. The muscle evidence is strong. The cognition evidence is promising, and studies suggest a benefit, but it is younger, the effects are modest, and it is not yet the settled science that the muscle story is. Interesting, worth having, not a miracle.

How much did the trials actually use?

This is a supplement where the numbers are well established, so here they are as what the research did, not as a prescription for you.

The maintenance figure used across hundreds of trials is 3 to 5 grams a day of creatine monohydrate, taken consistently, every day, not just on training days [4]. Some studies front-load with a loading phase, around 20 grams a day split into four smaller servings for the first five to seven days, to saturate the muscle faster, before dropping to the maintenance amount [4]. Loading is optional. Skipping it just means the tank fills over a few weeks instead of a few days.

Monohydrate is the form with the overwhelming majority of the research behind it. The fancier, pricier forms have not been shown to beat it. As always, the figures above describe what trials used. Check the label on whatever you buy, and run it past a pharmacist if you take other medication, so it fits your own circumstances rather than a generic average.

Is creatine bad for your kidneys?

For healthy kidneys, the evidence says no, and the fear usually comes from a genuine misunderstanding of a blood test.

Here is the confusion. Doctors estimate kidney function using blood creatinine, a waste product. Creatine supplementation naturally raises creatinine a little, simply because you have more creatine in your muscles turning over, not because anything is being damaged. So a routine test can show a slightly higher creatinine and look, at a glance, like a kidney problem when it is nothing of the sort [5].

When researchers measure kidney function properly rather than relying on that one marker, the reassurance holds. A 2025 systematic review and meta-analysis found creatine supplementation caused a modest rise in blood creatinine but no adverse effect on the actual filtration rate, the better measure of how the kidneys are working [6]. A separate narrative review went as far as calling time on the idea that creatine wrecks the kidneys in healthy people [5].

Two practical points. First, if you have a blood test coming up, tell whoever orders it that you take creatine, so a raised creatinine is read correctly. Second, and this is the real caveat: if you already have kidney disease, reduced kidney function, or you take medication for your kidneys, this is not a decision to make from a blog. Clear it with your prescriber first.

Who is it actually for?

Most adults over 50 who are willing to do some resistance training, which is the other half of the deal. It is one of the cheapest supplements on the shelf, one of the best studied, and one of the few where the benefit is not seriously disputed.

It will not do much on its own. Sat next to two sessions of lifting a week, decent protein and good sleep, it is a genuine edge on ageing well. If you are assembling the basics, our rundown of five supplements worth starting with puts creatine in context, and our free coach Duncan can talk through whether it fits what you are already doing.

The bottom line

Creatine is boring in the way the best interventions are boring: cheap, safe for healthy people, heavily researched, and quietly effective. Strong evidence for muscle and strength, promising evidence for memory, and a kidney scare that mostly dissolves once you understand the blood test. If you are over 50 and lifting, it earns its place. If you have kidney issues, have the conversation with your prescriber first.