Given that it is involved in over 300 enzymatic reactions5 in the body (for 2017 Scientific review), it may not come as a shock to learn that magnesium, according to Agyeman, is a key player in energy production: “Magnesium helps turn food into energy and is necessary for ATP production,” she explains. (Remember that ATP is the basic unit of energy in cells.)

So it makes sense that without enough magnesium in your body, you’re more likely to feel fatigued. After all, your body doesn’t have enough of what it needs to make the compound that feeds your cells.

Good news? Magnesium can be found in a variety of foods, including dairy products, legumes, seeds, whole grains, and leafy greens. Not so good news? It is estimated that the standard American diet contains only about 50% of the RDA for magnesium, which is 400-420 milligrams for men and 310-320 milligrams for women.

If you can’t meet your daily magnesium needs, supplements can help; just make sure you choose the right type of magnesium supplement (of which there are many). For example, Zhu calls magnesium malate the best for boosting energy, while Ferguson says magnesium glycinate can help support healthy sleep (which, in turn, can also help boost energy levels).