What is it?Holland & Barrett Vitamin D Spray is a pleasant peppermint flavoured oral spray that supports the maintenance of normal bones and muscle function, and the normal function of the immune system, in a convenient, fast, and effective way.Supports The Maintenance of Normal Bones and Muscle FunctionContributes Towards the Normal Function of The Immune System What Are the Benefits of This Spray?Vitamin D is one of the body's most important vitamins, helping it with a variety of tasks, it is produced in our bodies underneath our skin as a reaction to sunlight exposure.Vitamin D helps contribute to several important functions in the body such as supporting the maintenance of normal bones and muscle function, and the normal function of the immune system; it also regulates the amount of Calcium and Phosphate needed to keep bones and teeth healthy.