In situations such as changes in season, periods of increased physical exertion, stress, or after a bout of flu or cold, we can feel lacking in energy, tired, and fatigued. Sustenium Plus is formulated with Magnesium and Iron, which help reduce tiredness and fatigue, Thiamine, which contributes to normal energy function, and Vitamin C, which contributes to the normal function of the immune system. Usage: It is recommended to take 1 sachet of Sustenium Plus daily. Dissolve the contents in a glass of water (200ml).