Bananas don’t just look like smiles; they promote them, because they contain vitamin b9, aka folate, a nutrient that may fight depression by boosting a substrate that has antidepressant properties. Studies have shown an elevated incidence of folate deficiency in 50{7920e18cf5186565893a18d1f69fa52bf2806dc683a7bfcea51d671d2f7d8125} of patients with depression, and some doctors recommend increasing folate intake if you’re taking anti-depressants, to boost their effects.

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