Vitamin D3, also known as the sunshine vitamin, is required by the body to carry out essential functions and to maintain proper health of the system. The human body has the capability of synthesizing vitamin D3 on its own with the help of the sun. This requires exposure of skin to sun's radiations for a particular period. Vitamin D3 is found to be abundant in fish, eggs and meat (Proc Nutr Soc (2017) 76(3),392-399). Rejuvenation Therapeutics' Vitamin D3 comes in a capsule loaded with the required amount of vitamin D3. It is gluten-free and has no artificial fillers or rice. It is completely suitable for vegans. Vitamin D3 plays a very significant role in the absorption and metabolism of calcium and phosphorous. Calcium and phosphorus are essential for bone and teeth health. Deficiency of vitamin D3 will prevent the absorption of calcium from the diet into the body resulting in fragile bone health (Nat Rev Cancer (2014) 14(5),342-57). Studies show that an intake of 800 IU a day reduces the risk of bone health-related issues (Arch Intern Med (2009)169,551-61). Vitamin D3 production is directly related to the level of exposure of our skin to ultraviolet B radiation of the sunlight. Research indicates that children who were exposed to sunlight have better immune health (Epidemiol Infect (2006)134,1129-40). Low level of vitamin D3 in adults corresponds higher risk of immune health issues. In a study conducted among 50,000 men over a period of 10 years, it was found that men who were deficient of vitamin D3 were twice at risk of poor heart health compared to men with optimal levels of vitamin D3 (Arch Intern Med (2008) 168,1174-80). There are vitamin D3 receptors in the heart, through which vitamin D3 promotes a healthy inflammatory response in the cardiovascular system. PLEASE NOTE: This product is dated with the manufacturing date, not an expiration date, according to the FDA guidance. This product is good for at least 3 years since manufacturing.