But what does it mean if it’s green? What about ... you ate something very dark-colored or took a medicine or supplement that causes black poop. But this color can be a sign of a more serious ...

While black tea, espresso, and coffee bring the most caffeine to the table, green tea packs a moderate ... It’s a common belief that coffee made from dark-roasted beans has more caffeine than ...

Even among that group, however, there's a difference of opinion about what's considered "too light." GIA uses lab-graded comparison stones to determine if the green color is dark enough and saturated ...