Clothing

Gear

Accessories

Gear Question

First Endurance Optygen Supplement

Item #FIE0002 | 0 in Stock

Can anyone who has taken this comment on the side effects?

By Backcountry.com Employee October 17, 2008

Can anyone who has taken this comment on the side effects?

Helpful Votes: 0 Yes | 0 No

By Ranked #10 - Trail Running Accessories December 30, 2008

i haven't had any "side-effects" per se. because it's a stimulant if taken late in the day i can't sleep. but that is the same with coffee for me. I actually tested this stuff for First Endurance when it was first on the market. I never had any side effect in the negative at all. I didn't notice any effects as a stimulant. I did notice a pretty significant increase in watt output while on the bike. I have nothing but great experiences to say about this product!

Helpful Votes: 0 Yes | 0 No

Tech Specs:

Serving Size:
3 Capsules 
Servings Per Container:
30 
Ingredients:
Chromium, Cordyceps Sinensis, ATPro (Calcium Pyruvate, Sodium Phosphate, Potassium Phosphate, Ribose, Adenosine), Rhodiola extract 
Recommended Use:
Cycling, racing, training 

More from the Gear Gurus on the First Endurance Optygen Supplement

See More

Close This Window

Change me.