It has been suggested that iron may have an important link to Parkinson's Disease.
It has been claimed that exposure to certain levels of iron in food may heighten the risk of patients getting Parkinson's a study carried out by researchers at Buck Institute in Novato, California.
The experts discovered that certain levels of iron in food given to mice resulted in an increased chance of the rodents developing neuro-degeneration as they got older.
One of the biggest surprises was that the levels of iron needed to see the signs develop were about the same as is currently added to baby formula to help infants grow.
However, Julie Andersen, who led study which appears in the Neurobiology of Aging journal, was quick to play down the threat to young children.
The Los Angeles Times reports that she commented: "I don't want to imply that people should stop using formula."