Depends on your interest, if you want scientific studies or practical/anecdotal information. If you want science/studies I would start maybe with the krebs cyc

Depends on your interest, if you want scientific studies or practical/anecdotal information. If you want science/studies I would start maybe with the krebs cycle/ATP, ketogenic diet, ketosis, ketones as a by-product of fat buring. Maybe mix in studies about insulin, blood sugar levels/glycemic index, glucose, glycogen, glucagon/pancreas, amino acids/liver/gluconeogenesis. For more practical/functional/anecdotal information, usually your interest will be in sports/athletic performance. You might start with more generic blogs about glucose vs fat and then work your way into blogs of individual athletes in the sport you are most interested in. Although I distance run, I don't limit myself to the experiences of just other ultra runners. I also really enjoy reading about the various diets/experiences of body body builders, sprinters, other endurance sports, and mixed martial artists. It is such a wide gap in terms of performance goals and mass/muscle/weight goals.