Green tea contains caffeine and tannins, an antioxidant that can mess with iron absorption. So drinking it at certain times ...

Drinking green tea with L-theanine can cause calm alertness because the caffeine in the tea wakes you up, while L-theanine promotes relaxation.

Lauren Manaker is an award-winning registered dietitian, book author, speaker, and entrepreneur. She has been practicing dietetics since 2004, and has worked in a wide variety of settings. She earned ...

Everyday Health independently vets all recommended products. If you purchase a featured product, we may be compensated. Learn why you can trust us. Everyday Health independently vets all recommended ...

Everyday Health independently vets all recommended products. If you purchase a featured product, we may be compensated. Learn why you can trust us. Everyday Health independently vets all recommended ...

If it feels like you've been seeing the best greens powders pop up all over the internet in the last few years, you're not alone. Many of these mysterious verdant powders and potions purport to be ...