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Hazard assessment of germanium supplements
1Center for Food Safety and Applied Nutrition, Food and Drug Administration, Washington, DC 20204, USA.
Regulatory Toxicology and Pharmacology : RTP
|June 1, 1997
Summary
Prolonged intake of germanium supplements can lead to severe kidney damage and even death. Despite initial low acute toxicity, long-term germanium use poses significant human health risks.
Area of Science:
- Toxicology
- Environmental Health
- Mineral Metabolism
Background:
- Germanium-containing dietary supplements gained popularity in the 1970s as health elixirs.
- Germanium is not an essential nutrient for humans, and its acute toxicity is generally low.
Purpose of the Study:
- To review the adverse health effects associated with germanium-containing dietary supplements.
- To assess the potential human health hazards of germanium ingestion.
Main Methods:
- Review of 31 reported human cases of germanium toxicity.
- Analysis of animal studies investigating germanium dioxide and other compounds.
- Evaluation of reported doses and exposure durations.
Main Results:
- Prolonged germanium intake linked to renal failure, kidney dysfunction, tubular degeneration, and death in humans.
- Observed adverse effects include anemia, muscle weakness, and peripheral neuropathy.
- Animal studies corroborated human findings, showing impaired kidney and liver function and germanium accumulation.
Conclusions:
- Germanium products pose a potential human health hazard due to persistent renal toxicity.
- The risk is associated with both inorganic and potentially organic germanium compounds, especially if contaminated.
- Recovery from germanium-induced kidney damage is often slow and incomplete.