Regularly I spent my 2 hours on exercise for a lean body but I'm get too much tired after exercise and I also want to increase my exercise time but my energy level is almost down after 1 hour during exercise. I also reduce my diet and leave oily and high calories food and start eating fruits and vegetables. But still i'm feeling weakness, so I start using isolate protein whey (product name :- humabolic iso 100) I take its one scoop with a glass of water before the half an hour of exercise, it gives an excellent result to me but after using it 4-5 days, there are some acne on my face and I have doubt that the cause of these acne is the whey protein. Please tell me any solution how to prevent these pimples.