As stated on the website:
"The Nutrition Your Body Needs Before, During and After Intense Exercise*
Twinlab® Endurance Fuel® is a serious multi-stage formula that anticipates the body’s needs for pre, during and post-race nutrition.
Defense Complex: Fusion of antioxidants combined to protect muscles during exercise.*
Endurance Blend: Beta-Alanine supports muscular endurance, power and output; a powerhouse carb blend releases energy faster (waxy maize, glucose), sustains it (maltodrextrin), and acts as an energy reservoir to help you finish strong (isomaltulose); electrolyte blend aids proper hydration and helps you overcome heat stress.
Recovery Matrix: Time released whey and casein proteins, at a 4:1 carb-to-protein ratio, help prepare muscles for faster recovery even during activity."
Also, be sure to note the warnings:
"Do not use if you are pregnant or nursing, if you have any chronic disease of the gastrointestinal tract, if you have any other medical condition or are taking any medication. Not intended for use by persons under the age of 18. Consult your physician before use. Contains chromium picolinate, which may enhance insulin sensitivity in diabetics. Contains 99 mg of caffeine. Limit use of other caffeine containing products while taking this product, as too much caffeine may cause nervousness, irritability, sleeplessness, and occasionally, rapid heart beat. KEEP OUT OF REACH OF CHILDREN."