Holland & Barrett Vitamin D3 1000 IU Tablets plays a crucial role in maintaining normal bones, muscle function, and the immune system. Vitamin D, a vital nutrient for the body, is produced naturally when the skin is exposed to sunlight, specifically ultraviolet B (UVB) rays. However, research indicates that individuals over the age of one should aim for a daily intake of at least 10µg of Vitamin D to support bone and muscle health. Government guidelines suggest that a daily Vitamin D supplement may be beneficial, particularly during the autumn and winter months. Holland & Barrett Vitamin D3 contains 25ug (1000 IU) that supports the normal function of the immune system and is essential for maintaining bone and muscle health. Additionally, Vitamin D3 aids in the normal absorption and utilization of calcium and phosphorus. This Holland & Barrett Medium Strength Vitamin D supplement is also suitable for vegetarians.