Liver function Choline contributes to normal lipid metabolism and to maintaining normal liver function. Antioxidant Vitamin C contributes to normal energy-yielding metabolism, protects cells from oxidative damage, helps reduce tiredness and fatigue, and supports the normal functioning of the immune system. Instructions for use Take 1 ampoule daily, preferably before breakfast. It can be diluted in water or fruit juice. Alternatively, the ampoule can be diluted in 1.5 liters of water. Drink the mixture throughout the day.