What is it?Holland & Barrett D-Mannose Powder contains added Inulin, Cranberry, Magnesium and Zinc for normal function of the immune system. D-Mannose derives from cranberries; taking a D-mannose supplement often contains significantly more D-Mannose than is naturally found in food. Our D-Mannose powder can be mixed with water or a drink of your choice or sprinkled onto food.- Supports Normal Function of The Immune System- Added Inulin, Cranberry, Magnesium and Zinc- Good Source of D-MannoseWhat Are the Benefits of This Supplement?Contains Inulin, Cranberry, Magnesium and Zinc for normal function of the immune system. Cranberries contain Proanthocyanins.Magnesium contributes to a normal energy yielding metabolism, to the normal functioning of the nervous system, to electrolyte balance, to normal protein synthesis and to normal psychological function. Magnesium also has a role in the process of cell division. Magnesium also contributes towards normal muscle function and to the maintenance of normal bones and teeth, as well as to a reduction of tiredness and fatigue.