STC Nutrition Over instant energy gel is ideal for intense workouts. It comes in convenient individual sachets for quick consumption. This way you can quickly get a dose of energy when fatigue sets in. Its fast carbohydrates provide instant energy. Vitamins C, B2, B5 and B6 have been added to improve sports performance. Caffeine will reduce fatigue in a short time. Vitamin C is necessary for the chemical reactions of metabolism. At the same time it fortifies the immune system and prevents fatigue. Vitamins B2 and B5 help to convert proteins, carbohydrates and fats into energy. Vitamin B5 is also necessary for the formation of haemoglobin. Vitamin B6 is needed to regulate metabolism. Caffeine is a central nervous system stimulant that increases overall energy.