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Vitamin
Vitamin D3
Vitamin D3 is a recognised nutrient with a European Nutrient Reference Value, which means its content must be declared per portion on the label and expressed as a percentage of that reference intake.
Approved claims for Vitamin D3
These statements are shown in the exact wording approved for Vitamin D3 under EU and GB nutrition and health claims registers.
- Vitamin D contributes to the maintenance of normal bones.
- Vitamin D contributes to the maintenance of normal muscle function.
- Vitamin D contributes to the normal function of the immune system.
- Vitamin D contributes to the maintenance of normal teeth.
Claim wording last reviewed 2026-08-25.
Forms
Forms and what appears on a label
Different chemical forms of Vitamin D3 carry different amounts of the nutrient itself. Our labels declare the elemental or active amount per portion, not the weight of the compound, so the figure can be compared honestly with other products.
Sourcing
Where it comes from
Sunlight synthesis, oily fish, egg yolks.
In our formulas
Dose and how we use it
Sustainably-sourced lanolin D3 in our Immune and Bone formulations.
Take with a meal containing fat for optimal absorption. Pair with vitamin K2 to guide calcium into bone rather than soft tissue.
Exact amounts per daily portion are declared on every product label and on each product page.
Evidence
What research has — and has not — established
Nutrient function is established through the EU and GB authorised claim registers rather than through individual studies. Only the wording those registers permit appears on this page.
Safety
Cautions and interactions
Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle. Do not exceed the recommended daily portion. If you are pregnant, breastfeeding, taking medication or under medical care, seek professional advice before use.
Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle. Do not exceed the recommended daily portion. Keep out of reach of young children.
Featured in
Formulated with Vitamin D3
Deep dive
From the Journal
Vitamin K2: What It Is, How It Differs From K1 and What Evidence Shows
Vitamin K2 (menaquinone) is increasingly paired with vitamin D in supplements. This guide explains the difference between K1 and K2, dietary sources, what research supports, and the critical warfarin interaction.
Read articleVitamin D Deficiency Symptoms: What They Can Mean and When to Seek Advice
Low vitamin D often causes no symptoms at all. Where symptoms do occur they are non-specific — here is what UK guidance says and when to speak to a GP.
Read articleVitamin D Deficiency in the UK: Causes, Risk Factors and Prevention
Why low vitamin D is common in the UK, which groups are advised to supplement all year round, and the practical steps public-health guidance recommends.
Read articleAlso in vitamins