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.
Bile, a yellow-green bitter fluid that is produced by liver cells,  is continuously produced and then stored in the gallbladder until  needed. It is a digestive liquid which â¦ emulsifies fats and  neutralizes acids in partly digested food to aid in digestion.he gallbladder (or cholecyst, sometimes gall  bladder) is a small non-vital organ which aids in the digestive  process and concentrates bile produced in the liver.    The gallbladder stores and releases bile which is made by the liver.