IRON DEFICIENCY IS COMMON in humans. On the other hand, excessive iron (for example, with hemochromatosis) is associated with an increased risk of developing several cancers, including breast, colorectal, liver, and prostate.
This is the story of how a pharma company has milked a practically useless compound for the last 20 years, misleading its investors and offering the public hopes of miracle cures for everything from Alzheimer's, to cancers and Covid.
“It is likely that vitamin D supplementation does not provide major health benefits, especially in populations where the vitamin D situation is already good...