How to decrease 10 kg body weight within 2 months? i'm a 20years old boy?

Weight loss: Please see your Physician or a Nutritionist for a safe weight loss program. that will not harm your body.

Too fast: Losing weight too rapidly by fasting is not likely to result in a lasting change. Plan to lose half Kg per week through exercise and diet. It would be useful to consult a nutritionist or your doctor. Wish you good health!