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Due to the potential harm to human health, heavy metal deposition in agricultural products hasgained importance throughout the world. Excessive use of agrochemicals and poultry wastes dramatically increased during the cultivation processes of rapidly growing vegetables without maintaining authorized guidelines. It happens due to the availability and low cost of these materials and higher production of the vegetables. Higher levels of heavy metals, especially Arsenic (As), Lead (Pb), Chromium (Cr), and Cadmium (Cd) contamination in food have detrimental effects on human health as well as the environmental ecosystems. This study revealed the profile of the heavy metals in the fast-growing vegetable called red amaranth (Amaranthus cruentus) due to the frequent use of poultry manure. We collected a total of 75 samples of red amaranth, water, and soil from five villages of five different unions at Ishwardi upazila in Bangladesh, and we analyzed the contamination levels of As, Pb, Cr, and Cd in them. Except for the As, we found that the accumulation levels of Pb, Cr, and Cd in samples crossed the highest permissive limit compared to FAO/WHO standards. Results suggested that daily intake of red amaranth in this area is alarming to human health due to the detrimental effects of these heavy metals.