 Chronic arsenic As poisoning is a worldwide public health problem. Up to 100 million people worldwide, are chronically exposed to dangerously high concentrations of As in their drinking water and food supply. Bangladesh is facing a major public health challenge - contamination of groundwater by arsenic As. Since tube well water contamination by As was discovered in Bangladesh in the 1990s, As in drinking water has been reduced by 40, yet approximately 45 million Bangladeshis remain at risk from high As concentrations greater than the WHO guideline value of 10 μgL in the well water. The annual cost to treat As related health problems in Bangladesh is currently estimated up to 77.5 million. Micronutrient-deficient e.g. Selenium soils lead to less nutritious local foods, which becomes a partner in crime exacerbating the toxic burden incurred by As exposure. 