OstroVit Vitamin D 4000 IU 120 capsules OstroVit Vitamin D3 4000 IU is a high-quality dietary supplement that is a source of a micronutrient, which is vitamin D3. It is a preparation available in the form of easy-to-swallow capsules, created for seniors over 75 years of age and people who have an increased need for vitamin D3. The source of vitamin D3 - One capsule contains 4000 IU cholecalciferol. 1 serving = 1 capsule Efficiency - The packaging of the product is enough for four months of regular supplementation. Convenient form - The preparation in the form of easy-to-swallow, softgel capsules ensures a trouble-free supply of the valuable ingredient. OstroVit Vitamin D3 4000 IU - Richness of valuable micronutrient Vitamin D3 , also known as cholecalciferol, is a steroidal, organic chemical compound, which belongs to the group of fat-soluble vitamins. Thus, the assimilation of the ingredient is closely related to the presence of fats in the daily diet. Vitamin D3 is a substance, which is delivered to the body with food (it can be found i.a. in oily sea fish), as well as through skin synthesis. However, it is stored primarily in adipose tissue and liver. In addition to cholecalciferol, OstroVit preparation also includes a source of fat, which positively affects the absorption of the active compound and has a positive effect on the quality and effectiveness of the dietary supplement. Properties of the ingredients contained in OstroVit Vitamin D3 4000 IU Vitamin D present in the product helps to maintain healthy bones and teeth and in the proper functioning of muscles and what is more, it supports the proper functioning of the immune system. The compound also helps in the proper absorption and use of calcium and phosphorus and in maintaining the proper level of calcium in the blood. The substance is also involved in the process of cell division. Laboratory-confirmed quality For the sake of our customers' health, the products we manufacture are regularly tested in an independent accredited laboratory to ensure and maintain the highest quality. OstroVit Vitamin D3 4000 IU - Microbiological test 28.01.2026 OstroVit Vitamin D3 4000 IU - Microbiological test 03.12.2025 OstroVit Vitamin D3 4000 IU - Heavy metals content test 01.12.2025