Man goes from 96 kgs to 75 kgs by creating a calorie deficit

Low immunity level pushed this man to shed off kilos and become healthy. He created a calorie deficit and would strength train to lose weight and look toned. He lost 21 kgs in a span of 1 year. To boost his metabolism, he used to drink 5 to 6 litres of water and take balanced diet with quantified macros.