The purpose of this study was to examine the effects of caffeine, carnitine and mix supplements on exercise performing ability, lipid metabolism carbohydrate metabolism and lactate. Five undergraduate subjects were participated in the study. In a double-blind, place-controlled, all subjects performed a V₂ max exercise test. A resting blood samples was obtained(referred to as - 60min), and the subject ingested placebo, carnitine, caffeine and mix. Lipid(free fatty acids, triglyceride, glycerol) and carbohydrate(glucose, pyruvate), lactate were analyzed after blood sampling, which was taken four times in before exercise, after 30 min, 60 min of exercise, after finishing exercise performance. The findings of the study showed that 1) Significant difference between groups over time was observed in time to exhaustion(p<0.05). 2) The caffeine and mix group was higher than non-ingestion and carnitine group on lipid(FF A, glycerol) metabolism after exercise. 3) The carnitine, caffeine and mix group was lower than non-ingestion group on carbohydrate(pyruvate) metabolism after exercise. 4) The carnitine, caffeine and mix group was lower than non-ingestion group on lactate level after exercise. In conclusion, the findings of the current study indicate that carnitine, caffeine and mix supplement has a positive effect on exercise performing ability, lipid metabolism carbohydrate metabolism and lactate.