Research

Hormonal

Dietary supplements containing ephedra alkaloids pose a serious health risk, causing adverse cardiovascular and central nervous system events including hypertension, stroke, seizures, and death, even in previously healthy individuals at low doses.

Avoid dietary supplements containing ephedra alkaloids (ma huang). These products have been linked to heart attacks, strokes, seizures, and death, even in healthy people taking low doses. The potential for severe, permanent injury or fatality outweighs any unproven weight loss or energy benefits.

GoodSupportsHIGH confidence
The use of dietary supplements that contain ephedra alkaloids may pose a health risk to some persons... Ten events resulted in death, and 13 events produced permanent disability, representing 26 percent of the definite, probable, and possible cases.
Christine Haller et al. · New England Journal of Medicine · 2000

Why this rating

Review of 140 FDA MedWatch reports with standardized causation assessment; limited by underreporting and lack of denominator data.

Source

Adverse Cardiovascular and Central Nervous System Events Associated with Dietary Supplements Containing Ephedra Alkaloids

Christine Haller et al. · New England Journal of Medicine · 2000

DOI 10.1056/nejm200012213432502

case_series · n=140Cited 963×
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DOI resolved against Crossref · corpus check 2026-06-10

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