Vitamin D: An essential nutrient for immunity, bones and deficiency prevention

Vitamin D is a micronutrient essential for the proper functioning of our bodies. It is involved in calcium absorption, maintaining bone structure, and modulating the immune system. However, more than 70% of French people are deficient, especially in winter [1]. Let's discover its proven benefits and the recommendations of health authorities.

Major role in bone health

Vitamin D promotes the intestinal absorption of calcium and phosphorus, two minerals essential for bone mineralization. Chronic deficiency can lead to osteoporosis, osteomalacia, or widespread muscle pain [2].

The ANSM reminds us that vitamin D supplementation is essential for at-risk populations: the elderly, postmenopausal women, children, and people with little exposure to the sun [2].

Strengthening the immune system

Studies have shown that vitamin D plays a role in immune regulation. It stimulates innate immunity and reduces the excessive production of inflammatory cytokines, thus contributing to a better defense against respiratory infections [3][4].

Prevention of seasonal deficiencies

In France, the lack of sun exposure between October and April limits the cutaneous synthesis of vitamin D. Health authorities recommend supplementation for the majority of the population in autumn and winter [1][5].

Recommended supplementation

• Usual dose: 1000 to 2000 IU/day for adults
• Form: vitamin D3 (cholecalciferol), more bioavailable than D2
• Take with a meal containing fat for better absorption

Products available on Pharma+ France

We offer several pharmaceutical grade vitamin D3 formulations:

• Vitamin D3 1000 IU in vegetable capsules
• D3 + K2 Combination Formula for Bone Health
• Available in bottles, capsules or oral spray

Official references

1. ANSES – Recommended nutritional intakes for the French population, 2021.
2. VIDAL – Vitamin D: deficiency, indications, dosage, therapeutic sheet, 2023.
3. Martineau AR et al. *Vitamin D supplementation to prevent acute respiratory infections*, BMJ. 2017.
4. Charoenngam N, Holick MF. *Immunologic effects of vitamin D on human health and disease*, Nutrients. 2020.
5. French National Authority for Health (HAS) – Recommendations for vitamin D supplementation in adults, 2020.

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