DaVinci Laboratories D3/K2 Liquid Supports bone health, calcium balance, and cardiovascular function. Vitamin D is a fat-soluble vitamin that is essential for maintaining normal calcium metabolism. Vitamin D3 (cholecalciferol) can be synthesized by humans in the skin upon exposure to ultraviolet-B (UVB) radiation from sunlight, or it can be obtained from the diet. Adequate vitamin D levels may be important for maintaining blood pressure within normal ranges. Recommended use: Take 1 ml daily, or as directed by your healthcare practitioner. Shake well before each use. DaVinci Laboratories D3/K2 Liquid Serving Size: 1ml Vitamin D3 125 mcg (5,000 IU) (as Cholecalciferol) Vitamin K2 500 mcg (as Menaquinone-7) Other Ingredients: Sunflower oil, natural orange flavor, mixed tocopherols, romarinic acid.