Vitamin D is renowned for its vital role in the maintenance of normal bone health, in reality it actually acts on cells in every organ of the body and has extremely far-reaching effects on human health. Our bodies obtain Vitamin D from two sources, our diet and from the action of sunlight on our skin which drives the natural production within the body. Vitamin D is increasingly in the news as more and more research highlights the importance of this nutrient. Allergen Advice. The following list of allergens are excluded: Wheat, Barley, Soya, Eggs, Milk (and milk products), Lactose, Nuts, Sulphites, Celery, Fish, Shellfish, Yeast and Gluten containing ingredients. Keep out of the reach of children.