A gut health dietitian eats fermented foods every day. Here's 3 ways she gets more bang for her buck.

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Tanzil Miah (left) home-made kombucha (right)
Dietitian Tanzil Miah recommends buying locally-produced fermented foods.

Tanzil Miah/Getty Images

Do 'functional' drinks really work?

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Functional or "healthy" drinks claim to calm you down, boost your energy, or improve brain health. Celebrities from Katy Perry to Bella Hadid have embraced them. But are they actually worth it?

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