Manganese reduces nervous irritability, aids in muscle reflexes, improves memory, and helps combat tiredness. It's needed for normal bone building and is important in the production of thyrosin, the principal hormone of the thyroid gland. It is also essential for proper digestion and efficient use of food because it makes up enzymes that extract energy and metabolize proteins. It also helps the body properly use vitamin B1, biotin, and vitamin C. Manganese is important for normal central-nervous-system functioning and reproduction.
Good for These Symptoms:
Signs of Deficiency:
Optimal Level: From dietary sources
Maximum: 6 mg
Signs of Toxicity: Can reduce the body's use of iron.