For healthy skin, collagen is key: This naturally occurring protein keeps skin smooth and youthful, but our bodies produce less collagen as we get older. The result? Thinner skin, dryness, and more wrinkles.
Definition of BLACK BILE. : a humor of medieval physiology believed to be secreted by the kidneys or spleen and to cause melancholy. ADVERTISEMENT.1681. a humor of medieval physiology believed to be secreted by the kidneys or spleen and to cause melancholy. ADVERTISEMENT. 1681.
How internal bleeding leads to black diarrhea. Black diarrhea is made up of digested blood. When you have black diarrhea from internal bleeding, it means that the bleeding likely happened high up in your digestive tract. When you bleed in your food pipe or stomach, you donât always vomit blood.