Manganese is a trace mineral that is present in tiny amounts in the body. It is found mostly in bones, the liver, kidneys, and pancreas. Some of the health benefits of manganese include a benefit to healthy bone structure, bone metabolism, and helping to create essential enzymes for building bones. It also acts as a coenzyme to assist metabolic activity in the human body. Apart from these, there are other health benefits of manganese including the formation of connective tissues, absorption of calcium, proper functioning of the thyroid gland and sex hormones, regulation of blood sugar level, and metabolism of fats and carbohydrates. Moreover, Manganese is an actual component of manganese superoxide dismutase enzyme. It is a powerful antioxidant that seeks out the free radicals in the human body and neutralizes these damaging particles, thereby preventing many of the potential dangers they cause. The symptoms of manganese deficiency include high blood pressure, heart ailments, muscular contraction, bone malformation, high cholesterol, poor eyesight, hearing trouble, severe memory loss, shivers and tremors. Manganese toxicity symptoms tend to be neurological problems. Headaches, muscle cramps, fatigue, and aggressiveness are early signs of manganese toxicity which can lead to similar symptoms to Parkinson’s disease, or to the disease itself. The AI for manganese is 1.2 mg/ day for 1-3 years children, 1.5 mg/day for 4- 8 years children, 1.9 mg/day for 9-13 years boys and 1.6 mg/day for girls of the same age, 2.2 mg/day for 14 -18 years boys and 1,6 for girls of the same age. Adult men should have 2.3 mg/day and adult women should have 1.8 mg/day. Pregnant women should have 2 mg/ day and lactating women 2.6 mg/day.