Manganese is a naturally occurring mineral found in rocks, soil, groundwater and surface water. It is also found in food and is necessary for proper nutrition. However, too much of the mineral can be bad, specifically for certain at-risk populations, including infants under the age of 1 who are still developing.

Author Archives: Justin Franz
Justin Franz is a freelance writer, photographer and editor based in Whitefish. Originally from Maine, he is a graduate of the University of Montana's School of Journalism and worked for the Flathead Beacon for nine years. His work has appeared in the Washington Post, Seattle Times and New York Times. Find him at justinfranz.com or follow him on Twitter.