I have access to PubMed as an epidemiologist and did a lit review of the main ingredients in this product prior to purchasing. There is substantial evidence to support Beta-Alanine effects on high intensity efforts. CX seasons in which I used this product vs not using it, I perform better when I use it. You need to follow the dosing instructions and load your body for a few weeks before noticing benefits.

Obviously there is no magic pill that's going to boost my preformance to pro level. I know and realize that. However, I started taking Optygen 90 for the first time this season and while I know my increased performance is due to better conditioning, I also have to believe this supplement is helping. My times vs last year are definitely better. No scientific evidence to back that up, just feeling stronger. I'm planning to continue taking it at least for now.

I have been racing for 15 years and the product had none noticeable benefits. I was hoping maybe a small percentage in increase performance. Should listened to my coach and avoid the supplements, I’m embarrassed have spend the money. A questionable product and no concrete evidence the product works as performance enhancement. Maybe someday 60 minutes can shine some light on it.

I used Optygen for one racing season and did notice some tangible benefits. I started using it 10 days before my biggest race of the season and ended up having my best performance to date. I was able to stay at threshold more comfortably and I felt fully recovered the day after hard workouts. Some of the ingedients are often used as mood enhancers, and I did notice their effect. After the 3rd or 4th day of using Optygen I felt I was often in playful mood. I noticed the benefits of Optygen the most in the first two weeks of use. Because of this, I tend to use it only during very high volume training weeks and in the few weeks before a big event.