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Product features.
A good fit for Comparing a clearly stated high-strength D3 softgel when the appropriate amount has been reviewed.
- The label specifies cholecalciferol and the amount per individual softgel, making comparison with lower-strength products straightforward.
- The ingredient table identifies sunflower oil and a bovine gelatin shell, so the delivery format and animal ingredients are clear.
One softgel already supplies the NHS adult daily upper limit of 100 micrograms. A larger dose is not the routine recommendation for most people.
Read the ingredient evidence.
Vitamin D3 — Its nutrient role and prevention or treatment of deficiency are established; many broader wellness and infection claims are not. Benefits, women’s context & cautions
These findings concern the stated ingredient or studied preparation. The finished formula and retail version may differ.
Check the exact version, pack size and seller terms before buying.
The details that matter.
- Photographed pack
- 425 micro softgels
- Vitamin D form
- D3, cholecalciferol
- Amount per softgel
- 4000 IU = 100 micrograms
- Manufacturer serving
- 1 softgel; 425 servings per bottle
- Carrier and shell
- Sunflower oil; bovine gelatin and glycerine
- NHS routine autumn and winter advice is a 10-microgram supplement. This capsule contains ten times that amount; confirm a reason for choosing this strength.
- The NHS advises adults not to exceed 100 micrograms a day unless following medical advice. Include vitamin D from other supplements in the total.
- Contains bovine gelatin, so it is not a vegan or vegetarian alternative. Do not infer suitability for children from adult marketing.
Cycling & duration.
Ingredient timeframes describe the cited preparation; they do not establish a cycle for every finished formula.
Vitamin D3
- On/off pattern
- UK seasonal use is nutritional guidance, not a tolerance-reset cycle.
- Duration & evidence
- NHS advice is to consider 10 micrograms daily during autumn and winter. People at risk of low vitamin D may need that amount throughout the year.
- When to review
- Review season, sun exposure, risk factors and total intake. Prescribed deficiency treatment has its own clinician-led follow-up.
- Many people can meet needs through sunlight and diet from late March or early April to the end of September, but this does not apply equally to everyone.
- Taking breaks does not make excessive vitamin D safe; high-strength products need their own dose review.
Duration sources: NHS: seasonal and year-round vitamin D advice. Checked 2026-11-06.
Read the guide to supplement cycling, courses and review periods
How we assessed it.
Exact Amazon UK listing, product photograph and manufacturer ingredients and serving table checked on 6 November 2026. Descriptions compare label features; Gram Health has not tested this product or verified batch composition. Catalogue inclusion does not establish clinical effectiveness.
Retailer source: Amazon UK: VitaBright Vitamin D3 4000 IU 425 softgels · Details checked 2026-11-06.
VitaBright: Vitamin D3 4000 IU ingredients and serving table
NHS: vitamin D routine amounts and upper limits
These features explain the choice; individual fit, taste and health suitability can differ. Current stock, price and seller terms belong to the specific listing.
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Explore the topic and make the product details useful.
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Vitamin D3 3000 IU Oral Spray
A good fit for A spray format instead of a tablet or capsule.
A peppermint-flavoured spray with the amount per spray stated in both micrograms and IU, making the format easy to compare.
Read the ingredient evidence.
Vitamin D3 — Its nutrient role and prevention or treatment of deficiency are established; many broader wellness and infection claims are not. Benefits, women’s context & cautions
These findings concern the stated ingredient or studied preparation. The finished formula and retail version may differ.
Vitamin D3 1000 IU (25µg) Tablets
A good fit for A conventional tablet with a 90- or 180-tablet bottle.
A conventional D3 tablet with its amount expressed in both common units and a choice of bottle quantities.
Read the ingredient evidence.
Vitamin D3 — Its nutrient role and prevention or treatment of deficiency are established; many broader wellness and infection claims are not. Benefits, women’s context & cautions
These findings concern the stated ingredient or studied preparation. The finished formula and retail version may differ.
Selected from published product specifications and ingredient information. Read the reason and fit for each pick. How we choose products
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