I am having gym for last 6 month. One month ago I used on company mass gainer (1 kg, 100 g pr serving, contain 30 gm protein. But that was expired 2 year ago. So I consultant doc. And test some blood test like cbc, blood urea, creatine sgpt sgot .in report everything was under limit. Tham I used another mass gainer of promax company approx 1 kg (100 gm per serving contain 30 gm protein) then I buy whey protein of on company. So I want to ask you that protein I am having may effect on penis erection .i have 5 type of exercise in gym then I take protein.