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Nitrate, which plays an important role in plant growth, is a major environmental component. In this article, we focus on determining its implications and roles in the human body, and how it may increase the risk of certain diseases. Nitrogen and its subsidiaries are present in plants and animals alike in a noticeable amount. On average, humans consumes 70–100 mg of nitrate per day. Humans primarily obtain nitrates from meat and meat products. In a study by John. Lundberg, nitric oxide (NO), is involved in cardiovascular and metabolic regulation. Liu J, Thomas PS found that cigarette smoking increases nitrite/nitrate levels in exhaled breath. Human epidemiological evidence relating environmental nitrate exposure to the risk of cancer is methodologically weak. Nitrates themselves do not tend to cause cancer, but some forms of nitrogen does. When the user heats, nitrate is converted into nitrosamines . When the nitrites manufactured in our mouth are swallowed, one of the things that can happen is that they react in the strongly acidic environment of the stomach to form nitrosamines – some of which are carcinogenic and have been linked with bowel cancer. Nitrates can cause and cure many diseases. Nitrates can be considered as both boons and curses. Humans take nitrates mostly from natural sources and some processed products. Nitrogen is present in negligible amounts in urine, but in high amounts during urine infection due to the growth of nitrate-producing bacteria. Keywords: nitrate, nitrogen, cancer, diabetes