It has 4,000 international units (IU) of vitamin D3, right at the Tolerable Upper ... and the capsule is made of tapioca starch and vegetable glycerin. I think using vegan ingredients makes ...

In some countries, vitamin D is listed in micrograms, and the relationship is as follows: 2.5 mcg (micrograms) = 100 IU. 5 mcg = 200 IU. 10 mcg = 400 IU. 15 mcg = 600 IU. 20 mcg = 800 IU.

Vitamin D2 is also known as "ergocalciferol," and vitamin D3 is also known as "cholecalciferol ... D needed to prevent rickets is 100 IU (2.5 mcg) per day in infants with little to no sun ...

Several studies have shown that taking vitamin D3 (cholecalciferol) supplements can improve eczema symptoms by strengthening immune function and reducing inflammation. Note that vitamin D3 comes from ...