Difference between Glycogen and Starch
Glycogen and starch are a good source of energy aside from the energy that the human body produces. Glycogen can be found solely from animals and is created by the liver and the muscles and can sometimes be made in small amount by the brains and stomachs. Starch, on the other hand, can solely be found in green plants and staple foods such as oats, barley and potatoes. Glycogen has a single molecule while the starch has double molecules. In terms of the structure, glycogens are branched out purely whereas the starch consists of branch and chain components.
Well, the obvious difference between glycogen and starch, without delving into its structures and molecules, is where they are coming from. Glycogens come from animals only and starch from plants only.