What is the source of Vitamin D in this product? ​

We use Agaricus bisporus mushrooms that have been exposed to UV light to enhance the Vitamin D content. When we expose our organic mushroom powder to UV-B light, ergosterol, the natural mushroom sterol is turned into ergocalciferol (Vitamin D2).

Unlike the chemical processing necessary to turn animal-sourced lanolin into D3, our vitamin D2 is simply exposed to light, a gentle and natural process much like sunlight itself.

Mushrooms also contain trace amounts of Vitamin D4 which is unique to mushrooms Vitamin D4 in Mushrooms.

Studies have shown that daily administration of D2 is as effective as D3 in raising vitamin D blood serum levels.

Vitamin D2 Is as Effective as Vitamin D3 in Maintaining Circulating Concentrations of 25-Hydroxyvitamin D

Fortification of orange juice with vitamin D2 or vitamin D3 is as effective as an oral supplement in maintaining vitamin D status in adults