• Vitamin D3 (cholecalciferol) is more effective at restoring blood levels than the D2 form (ergocalciferol)
• Cholecalciferol has also been shown to increase the proportion of the active form of vitamin D compared to ergocalciferol.
• 2,500 IU of vitamin D per drop allows for easy daily dosing
• In a base of medium-chain triglycerides and organic flaxseed oil for better intestinal absorption

Vitamin D is a hormone now widely recognized as important for many body systems and a large number of physiological processes. It may also be one of the most common nutritional deficiencies in the world. Numerous recent studies have linked lower levels to an increased risk of cardiovascular disease, including hypertension, peripheral vascular disease, coronary heart disease, and heart failure, as well as several types of cancer, autoimmune diseases, and type 2 diabetes. Vitamin D is necessary for intestinal absorption of calcium, skeletal bone integrity, and skeletal muscle strength and function and has been associated with overall fitness. Vitamin D is essential for proper immune system function and may reduce the risk of infection, particularly respiratory tract infections. Since virtually every tissue in the body has a receptor for vitamin D, its importance can hardly be overstated. Many practitioners recommend supplementation to achieve blood levels of 25-OH-vitamin D between 50 and 80 nmol/L, which often requires doses of 1,000 to 2,000 IU per day, and more for individuals with common genetic variants affecting vitamin D metabolism.