How every number on this page is set
A composite food has no contaminant maximum level of its own — no government sets a heavy-metal ML for 'bone broth' or 'prepared meal.' The HMTc limit for each analyte is therefore a disclosed read-across from the strictest maximum level a credible government sets for the product's principal components, converted to the as-consumed basis. Credible regulators are the EU, Codex, US FDA, WHO/JECFA, FSANZ, Health Canada, the UK, and — for the terrestrial-animal-meat commodities that anchor an animal-bone stock — Hong Kong (Cap 132V). Occurrence never sets a value.
Bone broth is a long-simmered animal-bone and connective-tissue stock. Bone is the body's principal lead reservoir, and lead partitions from bone into the broth during prolonged, often acidulated simmering, so lead is the priority analyte and reads across the strictest credible animal-meat lead ML (FSANZ, 100 µg/kg) rather than a generic stock value; cadmium reads across the meat ML (EU, 50). Total mercury reads across the Hong Kong Cap 132V meat-of-animal mercury ML (50 µg/kg): terrestrial meat is not a mercury-bioaccumulation matrix, but a sovereign meat ML exists, so the cell is a disclosed read-across rather than an unbounded screen. Where no credible regulator sets a component ML (nickel, tin, aluminium, total chromium) the analyte is held under mandatory control; the species cells (inorganic arsenic, methylmercury, hexavalent chromium) are substantiated not-material determinations bounded by their measured total. A fish-derived bone broth additionally inherits the Category 6 seafood ceilings.
Master Limit Table
All values in ppb (µg/kg), as-consumed basis. 3 of 11 analytes carry a firm ceiling; the remainder are governed by mandatory control or reflex-speciation screening with no standalone number, itemised in the derivation below. A brand meeting every firm value on a like-for-like basis, and passing every control, qualifies for the mark.
| Analyte | Tier | HMTc limit | Binding basis |
|---|---|---|---|
| Lead (Pb) | Tier 1 | 100 | government read-across (AU/NZ) |
| Cadmium (Cd) | Tier 1 | 50 | government read-across (EU) |
| Total arsenic (tAs) | Tier 2 | control | mandatory control — no government ML; screened every lot (see note) |
| Inorganic arsenic (iAs) | Tier 1 | n/m | not material — controlled analyte (see note) |
| Mercury, total (tHg) | Tier 1 | 50 | government read-across (Hong Kong) |
| Methylmercury (MeHg) | Tier 1 | n/m | not material — controlled analyte (see note) |
| Nickel (Ni) | Tier 2 | control | mandatory control — no government ML; screened every lot (see note) |
| Tin (Sn) | Tier 2 | control | mandatory control — no government ML; screened every lot (see note) |
| Aluminium (Al) | Tier 2 | control | mandatory control — no government ML; screened every lot (see note) |
| Total chromium (Cr) | Tier 2 | control | mandatory control — no government ML; screened every lot (see note) |
| Hexavalent chromium (Cr-VI) | Tier 2 | n/m | not material — controlled analyte (see note) |
Tier 1 (Pb, iAs, Hg, MeHg, Cd) are zero-tolerance toxics with no established safe threshold. Tier 2 (tAs, Ni, Sn, Al, Cr, Cr-VI) carry a 150% transitional allowance under the program’s Status A–E framework.
Derivation — the binding sovereign limit
For Bone broth, each HMTc limit is the strictest maximum level any credible government sets for the product, named in the Binding column with the count of jurisdictions that concur at that value. Where no government regulates the analyte, the cell is a mandatory control or a not-material determination, never an invented number.
| Analyte | HMTc | Binding | Basis |
|---|---|---|---|
| Lead (Pb) | 100 | AU/NZ | disclosed read-across |
| Cadmium (Cd) | 50 | EU | disclosed read-across |
| Total arsenic (tAs) | control | screened every lot | mandatory control — no government ML |
| Inorganic arsenic (iAs) | n/m | ≤ tAs | not material in this matrix |
| Mercury, total (tHg) | 50 | Hong Kong | disclosed read-across |
| Methylmercury (MeHg) | n/m | ≤ tHg | not material in this matrix |
| Nickel (Ni) | control | screened every lot | mandatory control — no government ML |
| Tin (Sn) | control | screened every lot | mandatory control — no government ML |
| Aluminium (Al) | control | screened every lot | mandatory control — no government ML |
| Total chromium (Cr) | control | screened every lot | mandatory control — no government ML |
| Hexavalent chromium (Cr-VI) | n/m | ≤ Cr | not material in this matrix |
Cite this standard
Pendergrass, K. “Bone broth.” In Heavy Metal Tested & Certified (HMTc) Prepared and Packaged Meals standard, version 1.0. Institute of Contaminant Standards (ICS), 2026. DOI: registration pending.
The literature baseline for every analyte is maintained independently at the Heavy Metal Index. This certification standard applies those findings; the two are kept editorially separate by design.