principle applies to many vitamins and minerals: the body needs them, but more isn’t necessarily better.
A supplement can be useful when there’s a genuine need, but taking high doses simply because a product promises better sleep, more energy, or other benefits isn’t always appropriate.
The Bottom Line
Magnesium is essential for good health, and getting enough from food is important.
But people with impaired kidney function and people taking certain medications should be especially careful with magnesium supplements.
If you’re in either group, don’t guess about the right dose.
