NO2 Nitric Oxide Booster

I received thes NO2 Nitric Oxide booster in exchange for my honest opinion. I got these for my husband as he likes to work out a lot and figured this would be something good for him to try. I liked them and thought that they worked pretty good. They are like some of the other boosters out there, but he said he thought that these ones worked a little fast then others he has tried.