Overview
Razanov et al. measured lead, cadmium, zinc, and copper in poultry feed ingredients and edible poultry tissues, then evaluated whether replacing part of drinking water with a silicon-mineral extract reduced tissue accumulation. The paper is direct poultry occurrence evidence, but the intervention design means the values should be treated as feed/treatment-context evidence rather than routine retail-market poultry evidence.
Key numbers
Table 3 reports heavy metals in edible poultry parts on a mg/kg basis. Cadmium exceeded the cited maximum allowable concentration in skin, liver, white meat, and red meat, while red meat lead was at the cited maximum.
| Tissue | Pb mg/kg | Cd mg/kg | Zn mg/kg | Cu mg/kg |
|---|---|---|---|---|
| Skin | 0.01 +/- 0.004 | 0.09 +/- 0.004 | 25.0 +/- 0.02 | 4.6 +/- 0.04 |
| Liver | 0.02 +/- 0.004 | 0.24 +/- 0.002 | 16.8 +/- 0.04 | 7.8 +/- 0.04 |
| White meat | 0.38 +/- 0.004 | 0.06 +/- 0.004 | 6.5 +/- 0.04 | 17.4 +/- 0.04 |
| Red meat | 0.50 +/- 0.004 | 0.09 +/- 0.004 | 8.8 +/- 0.04 | 31.0 +/- 0.02 |
The abstract reports that silicon-mineral extract increased removal of lead, cadmium, zinc, and copper and reduced tissue concentrations, but the most routeable occurrence values are the tissue concentrations above.
Methods (brief)
The authors sampled feed raw materials and poultry edible parts, then measured Pb, Cd, Zn, and Cu against local maximum allowable concentration comparators. The paper distinguishes feed contamination from accumulation in skin, liver, white meat, and red meat.
Implications
This source can support poultry-product and chicken ingredient context for cadmium and lead, especially where contaminated feed is part of the exposure pathway. It should not be silently pooled with general-market poultry without noting the Ukraine feed-source and intervention context.
Related evidence
Update history
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