Performix SST Extreme V2X Thermogenic Supplement - 40 Capsules - Focus, Energy Boost for Men & Women - Caffeine, TeaCrine, Vitamin B12, BioPerine

Great product that I have been using for over a year. I consulted some of my medical friends and they said this was fine to take. It has definitely helped to slim me down and give me energy throughout the day. I would highly recommend!!

I think these are great in terms of it does what it tells you ! I however recommend splitting up the dosage, I take one in the morning and one before lunch time or sometimes before the evening. Keeps you going longer I think and would certainly keep that metabolism in full motion. I haven’t experienced any backlash or crashes. But if you are at all sensitive or prone to heartburn or acid reflux issues then may not the the best option.

Works like a charm! I only take half the dose and it works wonders. Take first thing in the morning and you’ll have energy and mental clarity all day.

I previously purchased this product from a GNC store with great results so I decided to buy it again through Amazon. The associate made a big deal about the VX2 being so much better. This time, the SST Extreme V2X gave me headaches and disrupted my ability to get a good night's rest, even if I took them right in the morning. I had taken them before, so I didn't initially assume the pills were the reason for my problems. After several weeks though, I realized that the issues only occured on days I took them.

I like the mental focus, and extended release. I do not take two capsules, I take one per day and feel great!!

Only took this product once, because it made me so hyperactive, that I could not function at all, made my hands shake, so I discontinued using it as a result. Other people may have a different reaction, but it did not work for me.

This really does boost stamina and overall improves ability to power through the morning routine. Be warned though, it is a blast of caffeine and if you’re sensitive to it, carefully introduce this to your overall health/fitness regimen.

My husband takes this for energy during his night shift