What type of stored biomolecules macromolecule allow the grizzly to hibernate this way without starving to death?

Grizzly bears rely on lipids, specifically stored fat, as their primary macromolecule for energy during hibernation. These fat reserves are metabolized to sustain their energy needs while they remain inactive for extended periods. This adaptation allows them to survive without eating, drinking, or excreting waste during hibernation. The ability to efficiently utilize these fat stores is crucial for their survival through the winter months.