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About the product 280 mg of Caffeine per serving (Limit 1 serving per day) 300% RDI Vitamin B12 - 600% RDI Vitamin B12 - 100% RDI Vitamin C 12 x Slim Tall 12 ounce cans L-Carnitine, D-Ribose, Caffeine, Turine, Inositol Spicy Hot Flavor (Check out Mild version in blue can for non-spicy flavor)