According to ALRI, high doses of NO boosters such as arginine, CM, DCM etc..impact the absorption of creatine. His product has a very low dose of NO precursors, the blend is only 550mg, so comparing that to up to 10g of arginine, that is quite a difference. His NO precursors are also much more bioavailable by tweaking their structures, so a lower dose can be used, having much less interference with creatine absorption. Also as he claims which I feel is true, is what is the point of taking a NO product, they havent been proven to have any effects on strength/lbm, I have seen a few studies claiming this, they just make you feel bigger for a couple hours then its gone. Personally I have never even hardly noticed a pump from NO supplements. Zero Tolerance, you could have Author answer this question for you if you post it in the ALRI section, he should be able to shed more light on the subject.