It can occur in patients with severely compromised intestinal function, those undergoing total parenteral nutrition, those who have had gastrointestinal bypass surgery, and also in persons of advanced age (i.e., over 90). People dependent on food grown from<unk> -deficient soil may be at risk for deficiency. Increased risk for developing various diseases has also been noted, even when certain individuals lack optimal amounts of<unk> , but not enough to be classified as deficient. For some time now, it has been reported in medical literature that a pattern of side-effects possibly associated with cholesterol-lowering drugs (e.g., statins) may resemble the pathology of<unk> .
Selenium deficiency
Fluorine deficiency
Chromium deficiency
Boron deficiency 
Biotin deficiency
Copper deficiency
Thiamine deficiency
Zinc deficiency