I have to lose 15kg to reach my ideal weight. i do cardio+body weight workouts 3 times a week. will drinking whey protein powder help me lose weight?

No: In addition to exercise, you need to reduce your intake of food and calories. Whey powder would be helpful if you were trying to gain weight. Wish you good health! - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex. Get HPV vaccine

If you need to: lose weight, you do not need to be drinking protein powder since it will only packs on more calories for you to lose. Having said that, it is worthwhile for you to use a protein bar or some combination of high efficiency carbohydrate and protein ~150-200 calories before your workout to maximize your stamina and calorie burning. This pre-workout snack will increase your metabolic rate and stamina