Maxx Boost Ninety percent of the reason you have a natural male enhancement is because of nitric oxide. If you are short of this nutrient, you will have a short toughness. One way to improve the production of nitric oxide is to use L-arginine, an amino acid. This amino builds muscle, releases growth hormone from the pituitary gland, fights infections and cancer. It improves the quality and duration of your erections. It helps the arterial wall cells to produce more nitric oxide.Here's a nutrient you should take. To stop the progression of plaque along the arterial walls, you should take an antioxidant. Use pycnogenol and other antioxidants such as vitamins A, C and E. You should also take L-arginine to increase your production of nitric oxide. By using these nutrients and lifestyle changes, you can harden your natural male enhancement.