An Assessment of Heavy Metal Contamination of Rice Varieties Produced Across India States with a Lens of Rising Cancer Burden

Background: Rice is a dietary staple for more than half of the global population, particularly in Asia. However, its vulnerability to accumulating environmental heavy metal contaminants during its production and processing raises significant public health concerns. Chronic exposure to arsenic and lead has carcinogenic health effects, posing a risk of lung, bladder, liver, and breast cancer. This study examines arsenic and lead contamination in rice varieties across different locations in India and their ecological associations with prevailing cancer. Methods: Rice samples were collected from 13 districts across six major rice-producing states in India (northern and southern regions). Selective Arsenic and lead concentrations were examined in collected rice samples and analyzed using standard testing methods. The results were compared with Food Safety and Standards Regulations (FSSAI) and World Health Organization (WHO) regulatory limits. A desk review of existing cancer reports was performed for ecological comparison. Results: Arsenic and lead concentrations significantly varied in rice samples across regions. In state-wise analysis, Maharashtra recorded the highest arsenic levels (mean: 3.14 ppm), while Madhya Pradesh had the highest lead concentrations (mean: 3.63 ppm). These values exceeded safety limits, and the sampled states had a high burden of lung, breast, stomach, and gastrointestinal cancers potentially linked to chronic exposures to heavy metals. Conclusion: There are regional variations in arsenic and lead contamination, often exceeding safety limits. Contaminant exposure to farmers and chronic ingestion can lead to deleterious health effects. Study highlights the need for strict regulatory oversight, safe agricultural practices, and further research into its hazards and prevention.