The best replacement for glycogen is starch.

The best alternatives to glycogen are rated as following:
★★★★★  starch
★★★★  glucose
★★★  glucagon
★★★  amylopectin
★★★  cellulose
★★  glycerol
★  amylose
★  fat burning
  muscle glycogen
  ketones
  triacylglycerol
  liver glycogen
  glycogen
  animal starch
  triglycerides
  linear acrylamide
  starch structure

Your alternative for glycogen is not listed? Suggest!
Speaking about glycogen, one probably shouldn't forget about pas.

Other search terms related to glycogen and their ratings are:
★★★★★ pas
★★★★ iodine test
You have in mind a companion for glycogen and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of glycogen in all years. Click on graph for more.
glycogen
starch
glucose