A great amount of lactic acid gets produced after doing sports or physical labor, which makes us feel tired. The citric acid inside this product gets absorbed directly into the citric acid cycle, which helps control production of the lactic acid. Citric acid derived from starch of sweet potatoes in this product was mixed with vitamins B1, B2, B6 and C which helps promote the citric acid cycle. Sweeteners such as oligosaccharide and fructose were added to this product. Those who tend to get quickly tired and those who do sports are recommended to take this product.