Heavy metals and contaminant limits in EU supplements

Supplements concentrate ingredients, and concentration can mean concentrating contaminants too — which is why heavy metals like lead, cadmium, mercury, and arsenic are a serious compliance concern. The EU sets maximum levels for certain contaminants in food, including supplements, and a product that exceeds them is unsafe and illegal regardless of how good its actives are. Managing contaminants from the ingredient specification is part of responsible supplement formulation.

The contaminant rules

EU law sets maximum levels for contaminants in food, consolidated under the contaminants framework (Regulation (EU) 2023/915 and related rules), with specific limits that can apply to food supplements — including for heavy metals. These are hard ceilings: a supplement has to stay below the applicable limit for each relevant contaminant, verified by testing.

Where the risk comes from

Some ingredients carry more contaminant risk than others. Botanicals can take up heavy metals from soil; certain minerals and mineral sources carry intrinsic levels; some marine ingredients carry mercury or arsenic. So the contaminant load of a finished supplement depends heavily on which ingredients and sources it uses — making the ingredient specification, with its contaminant data, the starting point for control.

It accumulates across the formula

Each ingredient contributes its contaminants to the finished product in proportion to how much is used, so the total contaminant level is a roll-up across the formula — like nutrients or cost. A formula heavy in a botanical or mineral source with a meaningful contaminant level can approach a limit even when each ingredient individually looks fine. Seeing the accumulated load from the specification is what catches this.

Manage it from the spec, verify by testing

The reliable approach is to hold each ingredient's contaminant data from its specification and certificate of analysis, roll it up across the formula to estimate the finished-product load against the limits, and then verify the actual product by testing. The estimate guides ingredient and supplier choices at design time; the test confirms the real product. Relying on testing alone, without designing for it, means discovering a problem after manufacture.

This is general information, not regulatory or legal advice. Requirements differ by market and change over time, so confirm current rules with the relevant authority or a qualified regulatory expert before relying on them.

Where Lemoniq fits

Lemoniq holds each ingredient's contaminant data from its specification and rolls it up across the formula — so the estimated heavy-metal and contaminant load is visible against the limits as you design, guiding ingredient and supplier choices before testing confirms the finished product.

The takeaway

Heavy metals and other contaminants are capped in EU supplements, and the risk rides on specific ingredients and sources — so the contaminant load is a roll-up that has to be managed from the specification and verified by testing. Designing with contaminant data in view is what keeps a supplement under the limits by design, not by luck.

Lemoniq rolls up contaminant load from your ingredient specs, against the limits. See how it works