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Vitamin D3: Price, Dosage & Where to Buy

Vitamin D3 is listed here as a dietary supplement. Status on file: General sale list medicine (GSL).

Here you can find reference details and legal purchase options in one place. In the United Kingdom, Vitamin D3 is sold over the counter.

Manufacturing status is not fixed, so check the summary below rather than relying on memory. Read on for forms, geography and the FAQ section.

Facts

Active ingredient
vitamin d3
General sale list medicine (GSL)
Licensing status not on file

No generic version on file

This product is sold as a food supplement. Food supplements are not assessed by the MHRA for safety or effectiveness before they reach the market, and they are not intended to treat or prevent any disease.

This product is sold as a food supplement. It has not been assessed by the MHRA and is not intended to treat or prevent any disease.

About Vitamin D3

Vitamin D3 is a dietary supplement containing vitamin D3, a nutrient involved in calcium absorption and normal bone, muscle and immune function. It may suit adults seeking nutritional support where dietary intake or sunlight exposure may be limited. Product details such as available strengths, serving size and storage conditions are not listed here, so the packaging should be checked carefully.

How Vitamin D3 works

Vitamin D3 is a form of vitamin D that the body can use in its vitamin D pathways. It helps the intestine absorb calcium and phosphate from food, supporting the mineral balance needed for normal bones and teeth. Vitamin D also contributes to normal muscle function and normal immune system function.

The body can make vitamin D in the skin after sunlight exposure, while food and supplements provide additional sources. The amount needed can differ between people, and a supplement does not replace a varied diet or appropriate medical advice.

What Vitamin D3 is used for

Vitamin D3 is commonly used as a dietary supplement to support normal calcium absorption and the maintenance of bones and teeth. It also contributes to normal muscle function and normal immune system function. These are general nutritional roles, not claims that the product manages a medical condition.

The product may be considered by people looking to increase vitamin D intake, although individual needs can vary with diet, sunlight exposure, age and health circumstances. A pharmacist or doctor can help assess whether supplementation is suitable and whether another source of vitamin D is already being used.

Key warnings

  • This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
  • Do not combine with other vitamin D or calcium supplements without checking the total intake with a pharmacist or doctor.
  • People with kidney problems, high blood calcium, or a history of calcium-containing kidney stones should seek professional advice before use.
  • Excessive vitamin D intake can raise calcium levels and may cause harm; follow the product packaging and professional advice.
  • Stop use and seek medical advice if unwanted effects occur. The product should be kept away from children.

Dosage from the label

The label lists no serving size for this product. No strength is listed for the available form. This means the product packaging should be checked for the current serving information before use, and a pharmacist can clarify any unclear wording.

Main interactions

  • Calcium supplements may add to vitamin D's effects on calcium balance, so combined use should be checked with a pharmacist.
  • Thiazide diuretics may affect calcium levels when used with vitamin D.
  • Long-term corticosteroid treatment may affect vitamin D and calcium handling; professional advice can help assess suitability.
  • Other vitamin D-containing supplements may increase total intake and should be checked before combination.
  • Medicines used for seizures may affect vitamin D metabolism; a pharmacist or doctor should review concurrent use.

Storage

No storage conditions are listed for this product. Keep the packaging closed and store the supplement in a cool, dry place away from direct sunlight and moisture. Keep it out of the reach of children and follow any storage directions printed on the packaging to maintain quality.

Missed dose

For a missed daily serving, avoid taking extra amounts to compensate. The usual approach is to resume the regular labelled schedule when remembered, unless a pharmacist or doctor advises otherwise.

Because no serving size is listed for this product, the packaging should be checked before the next serving. Professional advice is appropriate if several servings have been missed or if there is uncertainty about how to continue.

Pregnancy and breastfeeding

Anyone who is pregnant or breastfeeding should ask a doctor or pharmacist before using Vitamin D3. Vitamin D is a nutrient involved in calcium absorption, but suitability and total intake can vary. Check other supplements and fortified products with a healthcare professional to avoid taking overlapping sources.

Pharmacies near you

Use your location to open the pharmacies closest to you and ask them about Vitamin D3, the UK-licensed medicine with the same active ingredient.

Find pharmacies near me

Pharmacies by area for Vitamin D3 (UK-licensed equivalent)

Cities with the most pharmacies

Frequently asked questions

What is Vitamin D3?

Vitamin D3 is a dietary supplement containing vitamin D3. It is associated with calcium absorption and normal bone, muscle and immune function. No product strength is listed.

Who should check with a doctor or pharmacist before taking it?

Anyone who is pregnant or breastfeeding should ask a doctor or pharmacist before use. People with kidney problems, high blood calcium, or a history of calcium-containing kidney stones should also seek professional advice. Combined use with other vitamin D or calcium supplements should be checked.

Where is Vitamin D3 listed on this site?

Vitamin D3 is cataloged under Vitamins & Supplements. Grouping helps compare related dietary supplements.

Do I need a prescription for Vitamin D3?

No: Vitamin D3 is sold over the counter under UK rules.

Where can I buy Vitamin D3?

Check the region and city pages linked from this hub to find a pharmacy near you and ask them about Vitamin D3. Availability is not guaranteed at any single pharmacy, so call ahead.

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First published October 2, 2026 · Last updated · Report an error on this page