The question has been closed for the following reason "Question is off-topic or not relevant" by grooveDexter Mar 20 '13 at 22:30
Its likely you have heard that it works for some but there is no way of knowing whether or not it will work for you.
As for what it is, its just a supplement to use on top of a proper balanced diet. The theory is that Nitric Oxide widens the blood vessels allowing more blood, oxygen and nutrients to the muscles giving you greater endurance which enables you to train for longer and harder.
So its not an easy way to build muscle fast, you still need to regularly put in the hard work and eat a proper balanced diet to ensure you have the correct nutrients needed for muscle gain.
There are also risks, I suggest you Google Nitric Oxide risks and side effects which among others including low blood pressure and bleeding.
I would also consult a doctor before starting any supplement such as this so that he can tell me exactly what it contains and if its safe for me.
answered Mar 13 '13 at 06:20