Ingredient
Vitamin D3
The Sunshine Vitamin for Bones & Immunity
A fat-soluble vitamin essential for strengthening bones, immune defence, and muscle function.
What is Vitamin D3 Good For?
Vitamin D3 regulates calcium and phosphorus absorption, supports bone mineralization and muscle performance, plays a critical role in immune regulation and mood improvement.
Potential benefits of supplementation
- Maintains normal bones and teeth through improved calcium and phosphorus absorption
- Improves immune defence during viral infections (reduced hospitalization risk and faster recovery)
- Reduces depression risk through neurological pathway regulation
- Maintains normal muscle functions and reduces weakness in deficient individuals
- Reduces blood pressure in adults over 50 when taken daily for 6+ months
- Decreases inflammation
What is Vitamin D3 (Cholecalciferol)?
Vitamin D exists in two primary forms: D2 (ergocalciferol) and D3 (cholecalciferol). Vitamin D3 is the most bioactive and effective form, identical to the vitamin D synthesised in human skin when exposed to sunlight.
Modern lifestyles limit sun exposure, making supplementation the most reliable maintenance method, especially during winter.
Recommended Daily Dose
20 µg (800 IU, EU NRV)
20 µg (800 IU) per day is the EU NRV, sufficient to maintain bone and immune system in adults. Higher doses (1000–2000 IU) are often recommended, especially for populations with limited sun exposure.
Vitamin D3 in Detail
- Clinical Dose
- 20 µg (800 IU, EU NRV)
- Source
- Cholecalciferol (vegan lichen origin)
- Technology
- Oil-based or encapsulated forms for optimal bioavailability
- Key Benefits
- Maintains bone and tooth strength by regulating calcium absorption
- Improves immune defence and lowers inflammation
- Enhances muscle strength
- Contributes to improved mood and reduces risk of depression
- Reduces blood pressure in older adults (>50 years)
- Data
- Supported by extensive EFSA and WHO evaluations on bone, muscle, and immune system. Validated by decades of human research and regulatory consensus worldwide.
Supports
Your Questions About Vitamin D3
What is Vitamin D3?
It's the bioactive form of vitamin D, produced naturally in the skin with sunlight exposure and essential for bone, muscle, and immune health.
What are the benefits of Vitamin D3?
Strengthens bones, supports immune system, regulates calcium absorption, improves muscle function.
How is Vitamin D3 different from D2?
Vitamin D3 is more potent, longer-lasting, and more effective at raising and maintaining blood 25(OH)D levels than vitamin D2.
Are there any side effects?
Vitamin D is safe at recommended doses. Excessive intake (>100 µg or 4000 IU/day) can cause hypercalcaemia and should be avoided without medical supervision.
Can Vitamin D3 be combined with other nutrients?
Yes, it works synergistically with calcium, magnesium, and vitamin K2 for bone and cardiovascular health.
The Science That Supports Us
- 1Bislev, L.S. et al. (2022). Effect of daily vitamin D3 supplementation on muscle health: meta-analysis. Journal of Clinical Endocrinology & Metabolism, 107(5), 1317–1327.
- 2EFSA (2010). Scientific opinion on health claims related to vitamin D. EFSA Journal, 8(2).
- 3Golzarand, M. et al. (2016). Updated meta-analysis on vitamin D3 supplementation effects on blood pressure. Nutrition, Metabolism and Cardiovascular Diseases, 26(8), 663–673.
- 4Mikola, T. et al. (2022). Systematic review and meta-analysis of vitamin D supplementation on depressive symptoms. Critical Reviews in Food Science and Nutrition, 63(33), 11784–11801.
- 5Sobczak, M. & Pawliczak, R. (2024). Meta-analysis of vitamin D3 supplementation on severe COVID-19. Nutrients, 16(10), 1402.
- 6van Driel, M. & van Leeuwen, J.P.T.M. (2017). Vitamin D endocrinology of bone mineralization. Molecular and Cellular Endocrinology, 453, 46–51.
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