Pure Encapsulations Vitamin D3

https://www.pure-encapsulations.co.uk/vitamin-d3-5000.html?options=Size_60+capsules&options=Potency_5000+IU

Vitamin D3 5000 IU (125 ug) provides pure vitamin D as D3, the preferred form of vitamin D. Vitamin D contributes to the maintenance of normal muscle function and normal bones. Vitamin D also contributes to the normal function of the immune system.