United States Food and Drug Administration (FDA)

United States (federal) · Guidance — action levels (not health-based limits) · Established 1906 · Authored by Karen Pendergrass, Institute for Contaminant Standards · www.fda.gov

Quick read

The US Food and Drug Administration regulates heavy metals in food mainly through action levels — the concentration at or above which it may take enforcement action — rather than health-based limits. Its Closer to Zero initiative is setting action levels for lead, arsenic, cadmium, and mercury in foods for babies and young children. An action level is guidance, not the level deemed “safe”: FDA states exposure should be reduced as far below it as practicable.

Mandate & scope

The FDA oversees the safety of most of the US food supply. For heavy metals it works through action levels and guidance rather than statutory maximum limits: an action level is the concentration at which FDA may deem a food adulterated and act, set with achievability in mind rather than as a bright line of safety. Under the Closer to Zero plan (2021–) it has finalized lead action levels for processed baby foods (10 ppb for many purées, 20 ppb for dry cereals and root vegetables), and it maintains a 100 ppb inorganic-arsenic action level for infant rice cereal and a 1 ppm methylmercury action level for fish. FDA frames these as steps toward lower exposure, not as safe thresholds — consistent with the consensus that lead has no safe level. Its action levels are the practical US benchmark, but they are guidance, not binding limits.

Positions across metals

Where it diverges

FDA action levels are concentration values (ppb) in specific products and can be compared directly with EU maximum levels where the food category matches, but not with the intake-based guidance of EFSA or JECFA. FDA’s baby-food lead action levels are generally less stringent than the EU’s binding infant-food limits; FDA frames that gap as feasibility-driven and provisional under Closer to Zero, not as a judgment that its levels are protective. The recurring point in FDA’s own framing — and the one that matters most — is that an action level is a trigger for enforcement, never a declaration that exposure below it is safe.

Lead

Inorganic arsenic

Methylmercury

Update log

Key documents

References

Positions, the update log, and key documents above are generated from the per-instrument regulation pages this body issues, via tools/build-regulator-pages.mjs. The wiki reports what FDA has published; it does not endorse it. See HMTc separation policy for why reporting regulatory values is kept architecturally separate from certification threshold-setting.