That headline is likely referring to concerns that magnesium supplements, while helpful for some people, may be risky for certain groups.
Two commonly cited high-risk groups are:
- People with kidney disease — The kidneys help remove excess magnesium. If kidney function is reduced, magnesium can build up in the body and potentially cause toxicity, including low blood pressure, muscle weakness, irregular heartbeat, and breathing problems. (Office of Dietary Supplements)
- People taking certain medications — Magnesium can interact with some antibiotics, heart medications, diuretics, and other drugs, affecting how well either the supplement or medication works. (Healthline)
Health experts also note that high-dose magnesium supplements can cause side effects such as diarrhea, nausea, and stomach cramps, even in otherwise healthy people. The tolerable upper limit from supplements for adults is generally set at 350 mg per day unless a healthcare professional recommends otherwise. (Office of Dietary Supplements)
A clearer version of the headline could be:
“Experts Warn That Magnesium Supplements May Be Unsafe for People With Kidney Problems or Certain Medications.”
