Creatine doesn't cause any fat gain or prevent fat loss. It will help you build muscle and the bloat mostly takes away definition. A few days off creatine and the water weight will be gone.
If you want to grow and get leaner at the same time, do early morning low intensity cardio (fast walking/light jogging) before breakfast every day and keep lifting. Also seperate your protein/fat meals from your protein/carb meals.
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