Great brand, great ingredients. However, this product is WAY under dosed. For instance, an effective dose of Citrulline Malate is 6-8 grams! You would have to eat a lot of these pills for you to get the dosages needed to produce a noticeable effect.I wasn't getting amazing pumps, so I did some research and found peer-reviewed studies that show what these ingredients do and how much you need. Boy, did I get taken on this purchase! Read more

I bought this to address a problem I am having with a constricted cardiac artery while I wait for an official word from a cardiologist. I get chest pain from even a small amount of exertion. Taking the recommended dose of 4 of these allows me to walk around without chest pain. I'm really amazed at how effective it is. I buy 2 bottles at a time because 4 pills lasts about half the day. The capsules are relatively large, but could conceivably be taken apart. I have not experienced any side effects whatsoever. The increase in vascular activity helps with my overall energy as well. I take them on an empty stomach when I get up, then in the afternoon. Great stuff. Read more

I started taking these two weeks ago and they are working great! I take them about 30 minutes before my workout along with ZHOU's Horny Goat Weed. Gives me great energy and I get a much better pump. Not to mention my Libido has shot through the roof. I am 44 years old and I feel like I'm 26 again when I take these. Wake up every morning ready to rock wit it lol! I was skeptical initially but after careful reading of the reviews I decided to give these products a shot and I am glad that I did. I will be a repeat customer and do recommend these products to other's looking for a little boost in your workout routine and/or bedroom activity. Read more

Wow, I didn't expect this to be as good as it was! I didn't necessarily feel much of a conditioning/cardio boost as much as I noticed really good pumps and my arms looked twice as veiny. And guys, I gotta say there's a 'side-effect' that really just effects our main man part if you catch my drift. I swear when I take this stuff I'm pretty much half-mast for the rest of the day LMAO!! My girlfriend loves it when I take this stuff. I'll definitely be buying another bottle! Read more

I’m not an exercise enthusiast but I am trying my best. My goal is to lose weight and I seem to be faint of heart when it comes to pushing through. Since I started taking these, I notice that if I just hang on a little longer through the burn it goes ‘away’. I’m not sure how to explain it. But before I would just crash (and very quickly), since taking these I noticed that sometime after my muscles start burning to just stop, if I just hang on a little longer suddenly I will feel like I CAN do more. The burn will go a way and what settles in its place is strength. Again, not sure I am explaining this well. But when the burning goes away I feel like I can just do more (making me feel stronger). I am going to continue this. Read more

I was previously using a different brand of L Arginine and found that when taking the recommended amount of that brand I experienced water retention and leg swelling with pitting edema. It got so that I had to stop taking it as it basically crippled me and kept me from running on the treadmill or even walking my dog! I thought I'd give Zhou's product a try before totally giving up on L Arginine and have discovered that my body tolerates it very well. So far I take my pre workout dose at just two capsules 30 minutes before because taking the full recommended amount of 4 got me amped up just a little too much for my comfort. Then I take the remaining two capsules of the recommended daily dose about an hour before bedtime. My treadmill performance is now back to where I was before my adverse reaction to the other brand and an added benefit with Zhou's that I never experienced with the other is ...how to say this discretely without getting censored - let's put it this way, if you are a lumberjack then you'll definitely appreciate the increased ability to chop morning wood. Great stuff, thanks, Zhou!***Edit: I've discovered another benefit. I've taken two types of BP medication (Lisinopril and a Diuretic) for much of my adult life even though those meds only brought my BP down to "borderline hypertensive". The Diuretic caused me to have to visit the bathroom on average every two hours even at night which makes for crappy sleep. Taking N.O. Pro, my BP dropped to "borderline low" so I quit taking the diuretic. Now my BP is in the perfect range. AND I sleep all night!! I'm hooked. Read more

Pros: The package has a great aethestic. The capsules themselves were a good size, none opened up in the bottle. I had no adverse reactions. Having the bulk order discounts on Amazon definitely brought this up to at least 2 stars.Cons: I dislike the dosages. It be great to have a straight Arginine or Citrulline bottle, as I feel feel the total dosages of each in the NO Pro formula are too low. I take 33% more than the recommended dose and not feel a difference in my workouts. I am only 5'9", 180 lbs so average size, I imagine the majority of their customer base would benefit from higher/better dosages. Arginine is best 3-6g, while the NO Pro offers 1.2g per serving. Citrulline malate is best 6-8g preworkout, while NO Pro offers 0.6g per serving. By mixing suboptimal dosages of Arginine and Citrulline, I feel it ends up being closer to a "master of none". Try either a strict Arginine/AAKG blend or a strict Citrulline blend. The beet root is a small dose & is inconsequential, so might as well get rid of it.Still it would be great to have better dosages in bigger bottles. I still will take my remaining supply, at least to maintain my routine. Read more

I have PAD, peripheral artery disease, but after taking NO Pro for about a week I feel like I have much better circulation in my legs and feet. I also don’t feel the lag in energy during the day. I am very happy with the rewards for the price, and will continue taking this supplement! Read more