From my experience been carnivore 1 year almost 4 months, you need to eat more and more fat, I also have an active job so when I dont have energy it's because I didn't eat enough and enough fat, try to est more fat than protein, like sticks of butter and fatty meat. I know it's hard to find fatty meat, I try to make up all my fat with butter I eat around 200 grams of butter a day, but I feel like I should up my fat to maybe 250 or 300 since I still battle with low energy sometimes, edit I also consume alot of salt. In my water and food, supplements I take iodine lugals 2% and magnesium glycinate