Scientists have pinpointed exactly how much you need to drink of this daily staple to keep your bowels regular.

Research shows that there's an optimal amount of caffeine you can consume to enhance your performance. Too much will have a negative effect.

Medically reviewed by Elizabeth Barnes, RDN Since coffee is a diuretic, drinking iced coffee when it's blazing hot outside may not be as hydrating as you think. However, pairing it with water helps ...