Based mainly on sugarbeet sugar which has been inverted by using a protein enzyme that raises the monosaccharide's to almost 50% of the product, thereby enabling the bees to digest the syrup much more readily than simply feeding ordinary sugar solution.
Invertbee bee feed is an inverted sugar syrup made primarily from dextrose (glucose), fructose, and a small amount of sucrose derived from sugar beet. 
The specific breakdown of the ingredients is approximately:
Dextrose (glucose): 50%
Fructose: 47%
Sucrose: 3% 
Invertbee is produced by using a protein enzyme to hydrolyze (break down) the sucrose, making it a ready-to-use, high-density syrup that is easier for bees to digest than standard sugar solutions. This composition closely mimics natural nectar and helps prevent the feed from granulating (crystallizing) in the comb, which reduces the risk of starvation during the winter months.