Natures Aid Vitamin D3 contributes to: The maintenance of normal bones, teeth, muscle function. __Benefits:__ - _Prevention of deficiency_ including vegans, dark-skinned people, alcoholics, people with kidney, liver or coeliac disease. - _Seasonal Affective Disorder_. Supplementing with vitamin D can often produce improvements in mood in those with SAD in as little as a week. - _Bone Health_ as Vitamin D plays a key role in the regulation of calcium and phosphorus levels in the blood by promoting absorption in the intestines and calcium re-absorption in the kidneys. This leads to normal calcification of the bone matrix, needed for bone growth and repair. - _Immune Health_ as Vitamin D plays a role in the immune system by virtue of the fact that it promotes the process of phagocytosis (where immune cells engulf bacteria etc.), anti-tumour activity and a modulating effect on the immune system. Suitable for vegetarians. Can be used during pregnancy or while breastfeeding, but 400iu or 1000iu max a day. Can be used while on HRT and if you suffer from diabetes, but always speak to the doctor first. FREE FROM: GM, corn, dairy, lactose, gluten, wheat, yeast, nuts, salt, soya, starch and sugar, artificial colour and flavour.