The leaner you become, the longer it ta Pure Life Keto kes to lose fat healthily (the key, as you want to preserve as much muscle and strength as possible while losing fat). If you're at 25% body fat, it's very possible to lose 2-3 pounds of fat per week for the first several weeks. If you're at 10% body fat and are making a run for single digits, however, 2-3 pounds of fat per week would be impossible without dangerous drugs.