A registered dietitian dives into the benefits of black vs. green tea, highlighting which one may be best for your personal needs.

Many use l-theanine to improve stress disorders, mood and sleep hygiene. Yes. While black tea has less caffeine than coffee, ...

L-theanine is also present, in lower concentrations, in black tea. There’s less research on the effects of coffee on stress, but researchers have found moderate to high amounts of caffeine are ...

4 at 6:05 a.m. Do you start your mornings with a potent dose of caffeine from a freshly brewed cup of Joe? Or do you prefer a slightly less caffeinated nudge from a warm and gentle cup of tea?

To determine whether reported improvements in brain function for older adults are solely due to caffeine in green tea or whether other components play a role, ITO EN researchers led a double-blind ...

The newly discovered substance was dubbed "caffeine," meaning something found in coffee. Then, in 1838 chemists discerned that the effective ingredient in tea was ... a large black dog sleeps ...

Caffeine is the most commonly consumed psychoactive substance in the world (3). Soft drinks, tea and chocolate all contain caffeine, but coffee is the biggest source. The caffeine content of a ...

Caffeine was widely used by ancient civilizations. It was traditionally consumed from natural sources like tea, coffee, cacao beans and cola nuts and appreciated for its stimulating effects on the ...

Get the best tasting 'hug in a mug' with our reviews and advice for caffeine fiends and macchiato aficionados. Can't wake up without your coffee? Several billion cuppa-lovers can't be wrong. Our ...