Question with No2 Supplements and Dieting

[johnny g]

I am currently dieting down, my concern is with No2 Supplements. VPX Black Pearl to be specific. My question is will this make me hold any kind of water weight? I am currently on a low-carb diet and it seems that I am still hold water under the skin. My muscles aren't crisp as I would like them to be. My bodyfat is around 6 - 8 %. I had it measured with a skin fold calipers.