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If You're Feeling Angry
When you're angry, annoyed, or irritated, blame your serotonin. A small study involving brain scans of subjects with decreased serotonin suggests that low levels of the neurotransmitter inhibit the brain's ability to regulate anger, while normal levels can lead to calmer, more controlled responses. To keep cool, try a plantain. These tropical treats have one of the highest serotonin concentrations around (30 micrograms per gram). Their cousin, the banana, also packs a powerful serotonin punch.