What is it? Overview Usage Side Effects and Warnings

Manganese Side Effects and Warnings

Written by FoundHealth.

Safety Issues

Manganese is thought to be safe when taken by adults at a dose of 11 mg daily or less. The maximum safe dosage of manganese for pregnant or nursing women has also been established as 11 mg daily, or 9 mg if 18 years old or younger. 1 Very high exposure to manganese (due either to environmental pollution or manganese mining) has resulted in a serious psychiatric disorder known as "manganese madness."

Interactions You Should Know About

If you are taking:

  • Iron, copper, zinc, magnesium, or calcium: You may need extra manganese, and vice versa.
  • Antacids: You may also need extra manganese.


  1. Dietary reference intakes for vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc. National Academies Press website. Available at: Accessed October 4, 2001.


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