Suntrex D3 from Global Healing Center is a potent, vegan-friendly vitamin D3 supplement. The vitamin D3 used to make Suntrex D3 is a lichen-derived form known as cholecalciferol. Vitamin D3 is important to the body as it provides support to both the brain and the immune system. Suntrex D3 is carefully formulated using Dr. Group’s proprietary Spagyrex creation process. Each bottle contains 2 fluid oz.