Exactly what are nitrate supplements anyway? Nitric oxide which is a key ingredient in nitrate supplements must be present. You see that nitrate oxide supplies the human body with many health benefits. If a nitrate supplement is truly a nitrate supplement it must contain nitric oxide. If this important molecule is not present in the ingredients than the nitrate is a fake nitrate supplement. So make sure the nitrate supplement has the oxide in it. It is possible that the body could be deficient of nitrate oxide and if it is there could be serious health issues within the body. Like we said earlier this nitric oxide has so many benefits for the human body.