Barley is a good source of insoluble and soluble
dietary fiber. The soluble fiber portion contains the richest source of
beta-glucans compared to any other
grain; these can aid immune function. Barley also contains
B vitamins,
iron,
magnesium,
zinc,
phosphorus, and
copper, and is one of the richest sources of
chromium, which is important in maintaining blood glucose levels. Talbina, particularly its barley and honey components, is rich in
antioxidants and contains a high concentration of tocols and
tocotrienols, oils that help reduce the risk of cancer and heart disease.. Barley has been cited as a possible food to increase
tryptophan, and thus
serotonin in the body. ==Cultural significance==