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Heavy metals and lead in protein powder: what studies show

A 2020 peer-reviewed risk assessment (Bandara et al.) re-analyzed heavy-metal data from a 2010 Consumer Reports test of 15 protein powders and other published product data. [1]

What the research found

It modeled published data rather than testing products itself, and found plant-based and mass-gainer powders carried more heavy metals. [1]

For typical adult use, the authors found no increased non-carcinogenic risk; a worst-case cadmium scenario at three servings a day exceeded the safety threshold. The modeling covers adults only (it assumed a 70 kg adult). [1]

A 2025 study of protein powders on the Hungarian market found heavy metal levels low or undetectable, but said consumer safety stays uncertain because the industry relies on voluntary compliance. [2]

Which programs test for metals

USP Verified covers harmful levels of specified contaminants such as heavy metals. [3]

Sources

  1. Bandara et al., Toxicology Reports (2020), via PubMed Central — A human health risk assessment of heavy metal ingestion among consumers of protein powder supplements retrieved 2026-10-27
  2. Horváth et al. (2025), via PubMed Central — Analysis of heavy metal content in protein powders available on the Hungarian market retrieved 2026-10-27
  3. USP — USP Verified Mark retrieved 2026-10-27