Taurine is a protein precursor compound that our body is able to make under normal physiological conditions. Consumption of taurine in energy drinks stimulates the nervous system, increases energy, relieves fatigue, invigorates, increases endurance and relieves stress. Also, glucuronolactone is a type of carbohydrate source that is naturally produced in our liver. This combination is also an energy stimulant and is useful in strengthening memory, increasing concentration and relieving fatigue. All raw materials of Zamzam energy drinks are prepared from the best European brands. Every year, the results of tests to check the amount of vitamins and effective compounds, with sampling by the Standard Institute and the Food and Drug Organization, indicate the high quality of the compounds during the shelf life of this product.