Heavy metal contamination in herbal medicines poses risks exceeding safety limits
In short: Researchers analyzed 1,773 samples of herbal medicines to determine the levels of heavy metal contamination. The study found that 30.51% of the samples contained at least one metal exceeding the limits set by the Chinese Pharmacopoeia. While most plants were within acceptable risk levels, specific herbs showed significant contamination of lead, cadmium, arsenic, mercury, and copper.
The study used Inductively Coupled Plasma Optical Mass Spectrometry to measure metal concentrations and performed risk assessments for non-carcinogenic and carcinogenic effects. Arsenic was identified as the most hazardous metal across all indicators, with certain herbs like Plantaginis herba showing hazard levels more than 11 times the safety limit.
The findings highlight the need for universal quality standards to ensure the safety of herbal products. However, the study is limited by its reliance on a specific set of standards and the scope of the 1,773 samples tested.
Why it matters: Understanding heavy metal contamination in natural medicines is essential for establishing global safety standards for herbal products.
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