Taking creatine is safe for kids, teens, and adults of all ages, and doesn’t cause more side effects than a sugar pill, according to studies that looked at people from young children to older adults.

Taking creatine supplements the right way is probably safe and might help older people and kids stay healthy, without hurting their liver, kidneys, or metabolism, based on studies done so far.

Taking creatine — whether it's the common monohydrate type or another form — doesn't seem to cause more side effects than a fake pill, even in kids, older adults, healthy people, or those with medical conditions.

Taking creatine supplements might cause some unwanted side effects or might not even be made properly, so what’s in the bottle isn’t always what it claims to be.

Taking creatine every day for years — even up to 14 years — doesn’t seem to cause more side effects than a fake pill, no matter your age, health, or fitness level.

If young, healthy guys take a lot of creatine for 5 days straight, their muscles soak it up and end up with about 21% more creatine inside them.