Persistent tiredness isn’t usually caused by one problem. Learn how sleep, nutrition, movement, blood sugar, nutrient status, and modern work patterns quietly combine to affect your energy—and how to identify the pattern that’s most relevant to you.

You sleep enough hours, eat reasonably well, and still feel tired, stressed, or crampy. The reason may not be obvious. Learn the common signs of magnesium deficiency, why routine blood tests don’t always tell the full story, and what modern lifestyles have to do with it.