Why are steroids and some vitamins classified as lipids?

1 Answer
Jun 25, 2018

Steroids are oxidized derivatives of sterols, and fat-soluble vitamins are largely defined by their long acyl chains and/or large nonpolar domains.

Consider the biosynthesis of vitamin #"D"_3#,

Lehninger Principles of Biochemistry, 7/e

Light hitting the skin catalyzes an electrocyclic ring-opening reaction that gives rise to the vitamin in your body, metabolized in different areas.