Men: skip the soy and stick with grass-fed whey for optimal muscle growth and hormone maintenance In other words, soy protein is not what men who work out and train their bodies want to supplement with for muscle recovery and growth. Besides the f. Apr 18, · When I was in the best shape of my life I was going to the gym 5 days a week and having a scoop of whey protein right after each workout and had a great sex drive. Although soy can have an estrogenic effect, it's not the main ingredient and probably 50% of processed foods also have some form of soy so I doubt it's that. Reviews by patients who have Increased Sex Drive and take Whey Protein either as part of daily diet or as method of treatment. Positive and negative experiences from patients with Increased Sex Drive that take Whey Protein.