GNC AMP Ultra Nox, 120 Tablets, Maximizes Nitric Oxide Production

I can't speak to this as some user's are saying it gave them energy, but focus I can definitely agree on. This + my choice of pre-workout make for a rather volatile combination. You always hear people talk about "one more rep", but this product, and one other N.O. product that I forgot the name of, work great. I feel this definitely provided better flexibility and strength during the last rep in each of my sets where I could really squeeze the muscle I was focusing on and manage to get the remaining one or two out. I'd recommend it if you're looking for a good nitric oxide / pump booster to your workouts.

I am 61 and started lifting again about 3 months ago. I received a sample in the mail. The directions say to take 4 per work out. The 1st I tried just 1 and noticed a sustained energy level. The next I tried 2 about 20 minutes prior to lifting. 2 Is plenty for me. I believe it gives me an additional 30 minutes of high level energy. I will buy again.

I work out at 515 in the morning and before I got this in my pro pack and started taking it I was tired all day long. Since then I am more awake and focused all day.

Excellent product to take before your workout. The best thing is you can take it with your pre-workout or protein shakes!! It gives me that extra boost when I'm in my routine. A great buy at an even greater price!!

I would definitely recommend this product to anyone who is looking to increase there strength, endurance and vascularity. Great product for the price.

This is a great product, it really helps with my endurance. My VO2 Max has gone up, my cardio has gone up. And I love that I don’t crash off this stuff.

Awesome will continue to purchase

I would recommend this product to enhance definition, vascularity and cut. It also makes you sweat a lot more than you may be accustomed to...

I started using MuscleTech NANox9. Then swit chi Ed to this once MuscleTech pulled the X9 stuff. It’ll do, but it’s no where near as good. I’m going to keep searching for something better

I used this when I got it as a sample in my Pro Box. The plus side is because its Stim free, no adverse effects. But I also felt no positive effects. I felt nothing and my lift sessions were the same as any other day.