L-theanine is a popular supplement that can promote sleep and relaxation. Experts reveal the benefits and risks of taking it ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Who wouldn't want to take a pill and quickly experience less stress and anxiety without unpleasant side ...

Worldwide sales of green teas (such as matcha ), however, have been steadily climbing in recent years, buoyed in part by ...

Medically reviewed by Karina Tolentino, RD Key Takeaways The black tea in chai contains caffeine, which can cause a ...