Tech Insider
a portrait of Dr. Uma Naidoo next to an image of brain health foods like blueberries, walnuts, and dark chocolate.
Foods like berries, chocolate, greens, and nuts help support a healthy gut and protect your brain at the same time.
Tech Insider
Tanzil Miah (left) home-made kombucha (right)
Dietitian Tanzil Miah recommends buying locally-produced fermented foods.
Tech Insider

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?