By blocking both proton leakage into the mitochondria and increasing its respiratory capacity, Citrus Sinensis can increase ATP production in your body by giving you more energy when you need it most.
This fruit is also rich in flavonoids and carotenes, known to stimulate eNOS, responsible for the production of NO(nitric oxide). With more NO(nitric oxide) in your system, you can benefit from an instant increase in blood flow (vasodilation) because your blood vessels dilate more easily.
Combined with the vitamin C contained in this fruit, they work together to guarantee the health of your blood vessels and the longevity of your erections.
So you not only have a harder, but also longer lasting erection. This is also due to the higher amount of oxygen in the muscles. All of this gives you more energy, a longer erection and staying power in bed.