Originally Posted by Leucoethiops
I stick to Controlled Labs Purple Wrath, it's a BCAA complex with a solid ingredient profile; it's not an NO product.
When I do want a pre-workout stim, I take CL's White Flood, I don't believe any of these NO products offer anything other than a stimulant effect and a placebo effect, but sometimes the preworkout pickmeup is nice.
These NO products are generally geared around the same things these days, a vitamin B complex, niacin, caffeine, and 1,3 dimethylamylamine or its derivatives.
Those, and arganine alpha ketoglutarate; but the research showing its effects as a vasodilator is kind of lacking in any meaningful sense; although there is some research suggesting it aids in protein absorption.
I'm not convinced about NO "pump" products either. The truth is that if you're one of 99% of people, you are training properly, and are consuming isolate and/or BCAA's right after a workout, then you really don't need anything else "aiding" protein absorption. It's just marketing nonsense IMO.
If you're getting bored with your supplements and need to spice things up give it a whirl, but I'd never make it a staple or cut into my casein, isolate, and BCAA budget for any of it.