The liver can convert the glycerol backbone from triglycerides into glycogen to maintain glucose levels.

“you have a three carbon backbone that's called a glycerol backbone it has three of these free fatty acids that are will they become free once they're cleaved they become the substrate that you're going to explain to us in a few minutes is how you make bhp or beta-hydroxybutyrate but you don't just throw that glycerol out you connect the liver can turn that back into glycogen within itself - then yeah slowly trickle out into the bloodstream exactly”