I have done a very aggressive calorie deficit plan for 28 days. On 27/28 days I kept my calorie intake below 1500. Very little carbs, high volume of protein by comparison. I jog/walk 2 miles every day and do minor weight training for 15 minutes a day with a single 20lb dumbbell.
6’0 201 lbs now down to 185. Let’s say 5 lbs is water weight changes. That’s 10lbs down. And hopefully it’s mostly fat.