Why is D-glucose more common than L-glucose?

D-glucose and L-glucose are both glucose, but they have slightly different structure from one another. Glucose has the formula C6H12O6, and like the picture shows, they're different structurally, at carbon 4 and 5. read more

There, the functional groups are mirrored, and this is why D-glucose and L-glucose are called enantiomers. D-glucose is more common in nature, simply because that's the way early organisms formed glucose, and eventually other more complex lifeforms, descended from them, maintained the same enzymes and pathways that form D-glucose. read more

L-Glucose is an organic compound with formula C 6 H 12 O 6 or H–(C=O)–(CHOH) 5 –H, specifically one of the aldohexose monosaccharides. As the L-isomer of glucose, it is the enantiomer of the more common D-glucose. read more