Besides the exercise itself, which increases blood flow to everywhere, including the penis, whey protein itself has positive effect on your erection. It not only inspires you to exercise, adding to the penis blood supply and general physical health that can boost your sexual appetite; but whey protein also has ingredients that can increase your erection, both size and time.

Whey protein contains a substance called Arginine. Arginine is a chemical which has the same chemical constituents like Viagra does, and has the same function of improving the flow of blood into the penis. As you know, more blood circulation makes the muscle in the penis active, thereby giving you a better erection.

Whey protein also contains a drug called L-Tyrosine. L-Tyrosine has been known the increase sexual drive in men. The drug has, in effect, been laboratory tested to increase sexual hormone levels in the blood, thus increasing your drive.

So, whey protein, with these 2 important ingredients together, can positively affect your erection and make you retain a larger erection for a longer time, thus giving both you and your partner substantial sexual satisfaction. However, whey protein also often contains a percentage of creatine, which has been known to decrease penile erection to an extent. If you are worried about that, or are allergic to whey protein, you can also try rice protein or hemp protein. Both have the good qualities of whey, minus the bad side effects.