Abstract: A fat-burning, energy-producing water composition. The water composition contains spring water and a premeasured, effective amount of L-carnitine dissolved in the spring water at a concentration of no less than 100 mg and no more than 2000 mg per 16 oz of spring water. The water composition may further include at least one nutritious component selected from the group consisting of vitamin B-6, L-Lysine. vitamin B-3, vitamin B-12 and any combination thereof. The water composition may be carbonated or uncarbonated, flavored or flavorless. The water composition in bottled water is administered to a mammal for quenching thirst and increasing fat-burning, improving energy, and keeping body slim and fit.