If it has pycnogenol (I think that's the spelling), perhaps.... studies showed it did help to increase endurance, but you had to take A LOT to get the effects- which made it one expensive puppy. I mean, a 10 day supply would cost about $40, and you had to take it for months to see the effects, and even then, the results were varied.

If you want to increase endurance, do lots of LSD rides.... there you go, and it didn't cost you a penny!

Koffee