Lead contamination in cocoa and cocoa products: isotopic evidence of global contamination
2006
Critique of Lead Contamination Study in Cocoa
publication
Author Information
Author(s): Manton William I.
Primary Institution: University of Texas, Dallas
Conclusion
The study by Rankin et al. contains significant errors and misleading representations of data regarding lead contamination in cocoa products.
Supporting Evidence
- The figures in Rankin et al.'s study show twice as many data points as analyses.
- Lead is a naturally occurring element, and soil lead content varies based on parent material.
- The study incorrectly treats two types of cocoa shells as the same entity despite their different exposure to contamination.
Takeaway
The author believes that a study claiming lead contamination in chocolate is wrong because it misrepresents data and ignores important facts about lead in soil.
Potential Biases
The author has a potential conflict of interest as a paid expert witness for candy companies.
Limitations
The study's figures misrepresent data and do not accurately reflect the contamination sources.
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