The reason it’s so effective is that when you take ExtenZe®, significantly more blood rushes to the three erectile chambers of the penis. This increased volume means a bigger and harder erection. The key to this amazing natural supplement is the unique herbal blend. Each ingredient is chosen for its ability to increase blood flow to the penis to strengthen and fortify the erection’s staying power. There’s nothing artificial or narcotic. Just a safe, natural formula that maximizes the potential of your erect penis including both size and endurance.