The Vitamin D3 we use is derived from non-GMO lichen (Cladonia rangiferina)

The proper extraction of the vitamin D-rich oil from lichen is essential to preserve the integrity of the vitamin. Extraction occurs in a heat, light, and moisture-controlled environment, ensuring optimal freshness. 

Firstly, the lichen is sustainably wild-harvested; then it is cleaned (with water), dried and then milled. It is then gently processed with food-grade ethanol to extract the cholecalciferol, then filtered. This extract is tested by the ingredient manufacturer for safety, including solvent residue (must be under 5000 ppm per regulation) and content claims. The lichen-derived cholecalciferol is packaged and shipped to our manufacturing facility where it is tested again (by our manufacturer) for safety and content claims before use in any product.

We hope this additional information helps. Please let us know if you have any additional information!