L-arginine, however, another staple ingredient on most (2)penile enlargement pills, can be a precursor of nitric oxide supplements, which is known as the erection compound. Nitric oxide is important to widen the veins inside your penis, allowing more blood to penetrate to chamber of spongy erectile tissues. Studies show that L-arginine might help improve cardiovascular health. As you may know, a proper heart means better erections. Health-related evidence These pills not only increase blood flow to the genitals but also boost and balance production of sex hormones in your body. It is said that approximately 50 percent of men and women come with an allergy to latex. The elastic-like material that comes from the sap of rubber trees is the thing that most condoms are made from now. It has proven to be quite effective as being a defense mechanism against STD's. However, for a few, experience of Latex has been shown to be very irritating and uncomfortable. What do you do when you're allergic to latex and you also don't trust every other methods of safe sex? There are other alternatives. Both Polyurethane and Lambskin condoms are latex free. They are also thinner as opposed to typical latex condom, making sex a little more enjoyable from a sensational standpoint. The only downfall to using Lambskin and Polyurethane are: Polyurethane condoms usually fit a bit loose. You have to be extra careful when taking them off. Lambskins aren't as effective against STD's. They have tiny skin pores in them. Some STD's can certainly break through. Lambskin's aren't ideal for a non-monogamous relationship. L-arginine has been confirmed to aid raise blood movement to the penis, much like Viagra does, and the big difference is it does it effortlessly.