Popeye, the 1930s cartoon character who ate a can of spinach every time he got into trouble, may have been onto something: the leafy green vegetable is rich in the B-vitamin folate. A new study on depression from Japan found that men who consumed the highest amounts of folate were 50% less likely to be depressed than men who consumed the least folate. In another new analysis, researchers reviewed 11 depression studies, including 15,315 participants, and found that people with low folate levels were significantly more likely to be depressed than were those who had enough folate. As folate levels increased, depression symptoms decreased. Doctors concluded, “Although the research does not prove that low folate causes depression, we can now be sure that the two are linked.”