I just made a new batch of my Marathon Bars with the EnduRACE supplement. This is scientifically formulated to boost performance.
Proven results include:
Enhanced natural energy production
Improved maximal oxygen uptake
Enhanced resynthesis of energy from greater intracellular and extracellular phosphate availability
Greater cardiac output
Enhanced removal of lactic acid to improve anerobic threshold
http://www.healthelicious.com.au/Marathon-Bar.html
Toms Blog on Life and Livingness