Urogenx The reason is your hardness depends on blood circulation, proper oxygen blood levels, natural levels of nitric acid, and a strong cardiovascular system. A good hardness pill can address all of the above issues. But, this pill needs to be formulated with herbs. Just one single herb can serve as a tonic for the whole body. What is an herbal tonic? An herbal tonic is an herb that provides nutrients for many parts of the body, which gives those body areas a chance to improve their health. To be a good natural enhancement supplement, it needs to have four to seven or so herbs that target various parts of your body. Here is a typical hardness formulation: Horny Goat Weed - This leaf extract boosts sexual libido, blood flow through the penis, and improves sexual urge and vigor. Cuscuta seed extract - This extract improves zynev the strength and power of the sperm and reduces early ejaculation. Ginkgo Biloba - Ginkgo improves blood flow, which helps create hard erections. It helps to create better blood circulation and oxygenation.