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Green leafy vegetables are important food for people and animals. They are popular around the world and they form part of daily diets in many of the households as they are vital source of vitamins, minerals, fibres and antioxidants required for human health [1]. Due to increased anthropogenic activities, especially the application of modern technologies, environmental pollution and contamination of food chain has become unavoidable [2]. Vegetables grown in polluted areas contain both essential and toxic elements over a wide range of concentrations that enter human body through dietary intake of contaminated food. The consumption of heavy metal-contaminated foods pose risk to human health [3-5]. Although heavy metals like Cu, Zn, Mn and Fe play a significant role in plant physiology, heavy metals such as Pb, Cd and Hg are exceptionally toxic and are recognized as dangerous environmental pollutants [6-8]. Thus, heavy metal contamination of food items is one of the most important aspects of food quality assurance [9-11]. Various studies have shown that some common vegetables including Amaranthus species are capable of accumulating high levels of metals from polluted irrigating water or soil [3,7,12,13]. Although green leafy vegetables occupy a very important place in human diet, unfortunately Heavy Metal Levels in Amaranthus Species from Chang'ombe-Mchicha Area in Temeke District, Dar es Salaam, Tanzania