0_Apprentice
I like to take L-Carnitine for my long runs, it seems to help my endurance. Do you take any supplement?
1_Wizard
I don't, no. I know Carnitine was discovered in 1905, so it has been used for a long time, but I just try to follow the principles of good nutrition. 
0_Apprentice
Yes that too, but I believe athletes are always looking for an edge. and as long as it is legal to use it is ok.
1_Wizard
I think there are a lot of things that are technically legal but the government doesn't regulate a lot of these things so they may not be safe, so I think it is important to do your homework. I have two sons who are college athletes, and they are discouraged from using supplements.
0_Apprentice
yes, that seem reasonable since sometimes we don't know what long terms effects these supplements can have on health.  However some of them seems pretty sfe and have been around for a lot of time.
1_Wizard
Agreed! Many herbal concoctions have been used since ancient times and are surely just fine!
0_Apprentice
yes, however I would avoid any prepaid "special formulas" where you really don't know what you are taking.