Magnesium: Is it our new miracle supplement?

First came vitamin D, then collagen, probiotics, omega-3 and creatine. Now magnesium has taken the supplement throne. Trouble sleeping? Magnesium. Stress? Magnesium. A twitching leg, fatigue or constipation? Magnesium again.

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I’m very tired.

The mineral itself is not a fad. It plays roles in energy production, muscle and nerve function, blood sugar and blood pressure regulation, and bone health. Its popularity comes partly from how neatly it fits three common complaints of modern life: “I’m very tired,” “I’m very stressed” and “I can’t sleep.”

The growing list of magnesium forms has made the trend even more attractive. Citrate, oxide, glycinate, malate and L-threonate differ in solubility, absorption and effects on the intestines. Magnesium citrate dissolves relatively well, absorbs comparatively well and can help people with constipation by increasing bowel movements. Too much, however, can make trips to the bathroom excessively frequent.

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I’m very stressed.

Magnesium oxide is common and inexpensive, but generally absorbs less well than forms such as citrate. It can also have a laxative effect. Glycinate or bisglycinate has become a favorite because it is usually well tolerated and is marketed for evening use, relaxation and sleep. But the clinical evidence is not yet strong enough to call it a definitive “sleep magnesium.”

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I can’t sleep.

Malate is often linked to energy production and muscle function, yet there is not enough strong clinical evidence to tell every tired person to take it. L-threonate has attracted interest for possible effects on the brain, memory, cognitive performance and sleep. Some randomized controlled studies have reported positive results, but the research remains limited and short-term. For now, calling it promising while research continues is more accurate than presenting it as a guaranteed choice for brain health.

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Promising, research is continuing.