Key Benefits and Actions† FOR NEURO/IMMUNE SUPPORT & EVERYDAY USE. USDA Organic NEUROIMMUNE™ VITAMIN D3 (400IU) + K2 is vitamin formula used for enhanced immune function, and Neurological support & cognition. Vitamin D3, aka cholecalciferol, is the body’s preferred form of vitamin D and is superior to Vitamin D2 when it comes to raising the levels of Vitamin D in the blood Healthy vitamin D levels are essential for healthy immune function, blood sugar levels, mood, bone health, and more This super clean and easy to administer formula provides 10 mcg (400 IU) of vitamin D3 per serving Added Vitamin K2 for enhanced absorption Physician Formulated, cGMP, Third Party Tested