Zest features new research for happiness, calmness and confidence.

“Researchers at Taiwan’s Chung Shan Medical University say banana peel contains ingredients that increase levels of the happy hormone serotonin. They suggest you drink the water in which you’ve boiled a banana skin to get the boost. We tried it (boil for 15 minutes, sip when cooled) and it tastes like camomile tea with a banana kick.”

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