Common Nutrient Deficiencies for Adult Men

10. Folic Acid

Folic acid, or folate, is a water-soluble B vitamin. It occurs naturally in many foods and is added to staples in the U.S., such as breakfast cereal. Though this nutrient is most often talked about in regard to women's reproductive health, folate-deficiency anemia may occur among men, too, if they don't eat enough leafy green vegetables, yeast, fortified cereals, or organ meats.

Digestive illnesses like celiac disease, as well as alcohol consumption and anti-seizure medications, can also interfere with folic acid absorption. Symptoms of folic acid deficiency include poor appetite, lack of energy, diarrhea, pale skin, irritable mood, and an enlarged or sore tongue that may interfere with eating.