Now Liquid Vitamin D3 400 IU Drops For Strong Bones provide this essential vitamin in a highly absorbable liquid form. Vitamin D is generally obtained through diet or generated by the skin in response to the sun's UV light. However, there is not a lot of food. As more people avoid sun exposure, vitamin D supplementation becomes increasingly important to ensure that your body gets an adequate supply. As we age, our systems may absorb this essential nutrient less effectively. Vitamin D insufficiency has been linked to mood disorders, chronic diseases, and autoimmune diseases over time. Vitamin D improves calcium absorption in the intestines and maintains proper serum calcium and phosphate concentrations, allowing normal bone mineralization and preventing hypocalcemic tetany. It is also required for bone formation and remodeling by osteoblasts and osteoclasts. Without enough Vitamin D, bones can become thin, brittle, and deformed. Vitamin D regulates calcium and phosphorus intake and promotes appropriate immune system function. Getting enough vitamin D is essential for appropriate bone and tooth growth and development, as well as increased resistance to some diseases. The new Extra Strength Liquid Vitamin D3 formulation helps to maintain bones and teeth while also supporting the immune, brain, and nerve systems.