<prompt> Agranular endoplasmic reticulum is involved in the synthesis ofProtienLipidCarbohydrateVitamin D  <response>: Agranular Endoplasmic reticulum is also called smooth Endoplasmic reticulum. It is the site of steroid synthesis and detoxification. Granular is involved in protein synthesis.REF: Ganong;s Review of medical physiology 