Vitamin D3 (cholecalciferol) is a fat-soluble vitamin that helps the body absorb calcium and phosphorus to build and maintain strong bones and supports the normal function of the immune system against external threats. It is produced naturally by the body in response to sunlight and is found in certain food sources, such as fatty fish, mushrooms and eggs. However, since it can be difficult to get the daily amount needed through sunlight and food alone, taking supplements can help maintain adequate vitamin D levels year-round. Limited sun exposure, darker skin, or age can lead to vitamin D deficiency. Diet alone may not be enough to maintain normal levels, so you may want to consider taking a 100% natural vitamin D3 supplement with 4000 IU. Composition Content per serving (1 softgel): Vitamin D3 (cholecalciferol) 100 µg (4000 IU, 2000% NRV*); Organic extra virgin olive oil (EVOO) 171 mg. *NRV: Nutritional Reference Values. Other ingredients: softgel (bovine gelatin, glycerin). ingredients Organic extra virgin olive oil, soft capsule (bovine gelatin, glycerin), cholecalciferol. Nutritional value Content per serving (1 softgel): Vitamin D3 (cholecalciferol) 100 µg (4000 IU, 2000% NRV*); Organic extra virgin olive oil (EVOO) 171 mg. *NRV: Nutritional Reference Values. Other ingredients: softgel (bovine gelatin, glycerin). Pharmaceutical advice Food supplements should not be used as a substitute for a varied and balanced diet. Do not exceed the expressly recommended daily dose. Keep out of reach of small children. Store in a cool, dry place. Pregnant or breastfeeding women, persons under 18 years of age or those undergoing any medical treatment should consult a doctor before taking any food supplement.