Meats don’t exactly provide energy, they provide calories which is converted into energy through the Krebs Cycle. Protein/carbs/sugar all ultimately will be co

Meats don’t exactly provide energy, they provide calories which is converted into energy through the Krebs Cycle. Protein/carbs/sugar all ultimately will be converted and used by cells as glucose/glucagon. Generally you are correct and protein shouldn’t spike insulin like sugar, but certainly some protein will spike insulin. For example I’ve been experimenting with various proteins in ketosis and even whey isolate spikes my insulin and knocks me out of ketosis. Maybe they weren’t doing paleo diets so much as high fat diets and entering ketosis where the body stops using glucose/glucogon as primary source of energy and begins using ketones for cellular energy.