Natures Aid Vitamin D3 4000iu (100µg) provides a potent daily dose of vitamin D3, the form of vitamin D that is most effectively utilized by the body. Each tablet delivers 4000 international units of vitamin D3, supporting optimal bone health, immune function, and overall wellbeing. Vitamin D is essential for the maintenance of normal bones and teeth by aiding calcium absorption. It also plays a vital role in supporting a healthy immune system, muscle function, and may contribute to the reduction of tiredness and fatigue. This high-strength formula is ideal for individuals who have low sun exposure, those living in northern climates, or anyone requiring additional supplementation to maintain adequate vitamin D levels. Suitable for adults seeking to support bone density, immune resilience, and general health. Key benefits include: Supports healthy bones and teeth by promoting calcium absorption Contributes to normal immune system function Helps maintain muscle function and overall wellbeing Aids in reducing tiredness and fatigue Convenient 60 tablet supply for long-term use Recommended for daily supplementation, these tablets are easy to incorporate into your health routine. Always consult with a healthcare professional before starting any new supplement, particularly if you have existing health conditions or are taking other medications.