Magnesium calms the nerves. As this mineral mediates digestive processes, a lack is associated with many eating-related problems, including vomiting, indigestion, cramps, flatulence, abdominal pain, and constipation. When under stress, we use up much magnesium. Chocolate cravings may be a sign of magnesium deficiency, because chocolate is high in magnesium. Magnesium deficiency has been implicated in depression, diabetes, heart disease, migraines, and menopausal symptoms. Natural sources of magnesium include dark, leafy vegetables, sea vegetables, and whole grains.

Experts estimate that 25 percent of people with diabetes are low in the mineral magnesium. The problem is even worse in those who have diabetes-related heart disease or a type of eye damage known as retinopathy. Since low levels of magnesium have been linked to damage to the retinas, it's likely that upping your intake of this mineral may help protect your eyes. Good sources of magnesium include baked halibut, which contains 91 milligrams of magnesium per 3-ounce serving, 23 percent of the DV. - Prevention's New Foods for Healing: Capture the Powerful Cures of More Than 100 Common Foods by Prevention Magazine