Manganese Safety & Side Effects
Our assessment
Based on FDA data, manganese has a well-documented safety profile when consumed from food sources, but toxicity is a serious risk from non-dietary exposure. The primary safety concern is not from oral supplements but from inhaling manganese dust or consuming contaminated water. Symptoms of manganese toxicity include tremors, muscle spasms, hearing problems, mania, insomnia, depression, loss of appetite, headaches, irritability, weakness, and mood changes NIH ODS ↗.
Safety profile
FDA data on adverse event reports for manganese is limited. The primary safety data comes from observational studies of occupational and environmental exposure. The most serious side effects involve neurological symptoms such as tremors and mood changes, which can mimic Parkinson's disease. These effects are typically associated with inhaling high levels of manganese dust from welding or mining work, or from drinking water with very high manganese levels NIH ODS ↗.
Who should be cautious
Individuals who work in welding or mining environments should exercise extreme caution to avoid inhaling manganese dust. People with liver conditions, such as cirrhosis, may be more susceptible to manganese toxicity because the liver helps regulate manganese levels. Manganese is not known to interact or interfere with any medicines, but you should tell your doctor, pharmacist, and other health care providers about any dietary supplements and prescription or over-the-counter medicines you take NIH ODS ↗ FDA FAERS ↗.
Our recommendation
Data not available on a specific safe dose for manganese supplements. Studies have not shown any harm from the manganese in food and beverages. However, do not consume water with very high levels of manganese, and avoid inhaling manganese dust. If you are concerned about manganese intake, consult a healthcare provider. Data not available on specific report counts from FDA adverse event data for manganese supplements NIH ODS ↗.
AI-assisted analysis. Data sourced from NIH ODS and FDA.
Safety Overview
Studies have not shown any harm from the manganese in food and beverages, but some people have developed manganese toxicity by consuming water containing very high levels of manganese. Another cause of manganese toxicity is inhaling large amounts of manganese dust from welding or mining work. The symptoms of manganese toxicity include tremors , muscle spasms , hearing problems, mania, insomnia , depression , loss of appetite, headaches, irritability, weakness, and mood changes. People should not consume more manganese than the upper limits from food, beverages, or dietary supplements unless their health care provider recommends doing this. The daily upper limits for manganese include intakes from all sources—food, beverages, and supplements—and are listed below.
Drug Interactions
Manganese is not known to interact or interfere with any medicines. Tell your doctor, pharmacist , and other health care providers about any dietary supplements and prescription or over-the-counter medicines you take. They can tell you if the dietary supplements might interact with your medicines or if the medicines might interfere with how your body absorbs , uses, or breaks down nutrients , such as manganese.