Our Vitamin D3 is sourced from wild-crafted, non-GMO Lichen. 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. While processing the lichen, the temperature does not go over 158° Fahrenheit (70°C). 

In oil extraction, there are two points when temperature is caused to rise. Heat is generated as the material is macerated; the temperature is not measured at this time, but the manufacturer estimates the maximum temperature 40-50°C locally. Additionally, heat and pressure are used as part of the process; this is kept below 70°C.