Smooth Endoplasmic Reticulum (SER) is involved in the synthesis and storage of:

The Smooth Endoplasmic Reticulum (SER), as its name suggests, is an organelle that is membrane-bound but lacks ribosomes on its surface, which distinguishes it from the Rough Endoplasmic Reticulum. The primary function of SER is to produce lipids such as phospholipids and cholesterol, which are required to assemble cell membranes.