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"I think you guys [gals ?] are the best. Free shipping on hammer products and super fast service. What's not to like?"

Nancy H.


Proline Sports Nutrition & Equipment,

I was shopping for the product below using Google as which time I saw your Google add. This was the first I heard of your company. I went to your site and liked what I saw and proceeded to order the Optygen HP. The order was placed on late Friday afternoon and was delivered (to my surprise) on Saturday. Your service is awesome as well as your price match guarantee. There is no doubt that I will continue to use you in the future, as well as recommend you to others.


Brian H
Aurora, IL
 I am very impressed with your customer service.  I was worried about getting my order with a marathon a week and a half out.  Wow, less than 24 hours and my order was sitting on the porch.  That is phenominal service.  I will definately shop with you again.  I have had free shipping take 10 days.  Proline Sports Nutrition is a site I will recommend to my many running/cycling buddies.  Thanks for the great response.  BTW, that info on the Hammer Nutrition products was wonderful!!  It helped me hone in on my nutrition/hydration plan for my marathon.  I printed off the entire 120 pages!  This is my 4th marathon.  I've trained hard, and my Hammer plan I do believe will give me a PR.
2021 First Endurance Optygen 90 Count Endurance Supplement

In-Stock and Ships Same Day

Are you prepared to achieve your Personal Best this year? First Endurance Optygen, the number one endurance supplement on the market for the last 5 years can help you achieve your goals.

Optygen is a revolutionary endurance formula that's designed to help you optimize performance, maximize oxygen utilization and achieve greatness. The patent-pending, legal, safe and stimulant-free Optygen formula is based on human clinical trials and the latest scientific research on increasing endurance. It's so effective, there's a 100% performance guarantee... Click here to view Optygen Q&A

Customer Reviews
5 star 
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Average Review
  • Currently 3/5 Stars.
4.5 out of 5
4 Customer Ratings
Recovered with no problems
  • Currently 3/5 Stars.
Rating 5/5
Last year I did my first triathlon and used Optygen to help me with my training. I felt good, but had a bit of trouble taking all those pills during the "loading" phase. I didn't know how much the optygen was aiding my training or how much was a psychological edge. Whatever it was.. I want it back. I ran the Chicago Distance Classic a few weeks ago in the humidity and was not using any supplements -- I felt like crap. A few months prior, I had a PR at the MiniIndi half marathon and recovered with no problems thanks to the use of Optygen and Acid Zappers. I just got my new bottle of Optygen and am ready to start the "load" phase as I hit the heavy mileage for my Marine Corp Marathon at the end of October.
Posted by Anonymous Verified Buyer
11/11/2007 - 05:37 PM
Increased my endurance
  • Currently 3/5 Stars.
Rating 5/5
Ihave used this product for many years and I have great results on the field and in speeding my recovery after hard workouts. But, checkout the newer HP version of this. I mean .. wow!

Beta-Alanine, an amino acid that allows your body to produce significantly higher carnosine levels for metabolizing lactate, does its natural job of increasing muscular endurance, boosting strength, improving exercise capacity and delays muscular fatigue. Rhodiola Rosea and Cordyceps adaptogens, first used by Tibetan Sherpas to help them climb Mt. Everest, have been shown to increase VO2Max, lung function, oxygen utilization and anaerobic threshold significantly.
Posted by Anonymous Verified Buyer
10/25/2008 - 05:58 PM
Friends raved about Optygen
  • Currently 3/5 Stars.
Rating 4/5
I'm not a supplement guy, but friends raved about Optygen, so I decided to give it a shot. I used it exactly as directed, ramping up consumption as I ramped up and then tapered for my biggest race of the year. That race happened to be my first win as a competitive cyclist! Now I'm looking forward to trying Optygen HP.
Posted by * Verified Buyer
11/12/2009 - 01:35 PM
Optygen gave me what I needed
  • Currently 3/5 Stars.
Rating 4/5
This product has sincerely helped me with my performance on the bike. I was consistently lacking a little something in my riding, for those long hard (race like) group rides, always coming up short in the final sprint. Optygen gave me what I needed. I would continue to use this product, if it was not so costly. I just pick and choose when I use it. If it was not for stiff cost, I would use it consistently throughout the season. One more thing, I have used the Optygen HP as well and it was even more effective, but again cost was an even more difficult factor in my ability to use it regularly, so Optygen was my main product of use. I wish I could use it more. Enjoy the benefits. John F Waxhaw, NC
Posted by * Verified Buyer
11/12/2009 - 02:10 PM
Resources for Today's Endurance Athletes ®

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