It's normal for men to experience slower arousal times as they age and for erections to be less firm. Viagra works by promoting nitric oxide flow.
Nitric oxide is the signaling substance for initiating and maintaining erections.
It spurs blood and oxygen flow, as well. L-Arginine is the essential amino acid necessary for the formation of nitric oxide. It's included in the supplement ArginMax . Other key ingredients in the ArginMax formula are ginseng and ginkgo. These help convert L-Arginine to nitric oxide and promote microvascular circulation.