Nature Made Vitamin D3 1000 IU
- Vitamin D
- Tablet
- Vitamin D3
- 300
- More reviewed than 67%
A plain, gluten free D3 tablet whose main advantage is a near full year's supply in one bottle at a standard 1000 IU maintenance dose.
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How it ranks among the 137 vitamin d we track
4.8★ across 5,200 Amazon ratings, Bayesian-smoothed toward the category average.
5,200 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
3,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 137 vitamin d we track - how the scorecard works · full vitamin d data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Nature Made Vitamin D3 1000 IU (25 mcg) comes as 300 small tablets, roughly a 300-day supply at one per day. It is gluten free and formulated to support bone, teeth, muscle and immune health.
D3, or cholecalciferol, is the same form of vitamin D the body makes from sun exposure, and it is generally regarded as more effective at raising blood levels than D2. This bottle's main selling point is quantity: 300 tablets means most buyers will not need to reorder within the year.
- 1000 IU (25 mcg) D3 per tablet
- 300 tablets, 300-day supply
- Gluten free
- Supports bone, teeth, muscle and immune health
Who it's for
Fits adults who want a simple daily maintenance dose of vitamin D and prefer buying in bulk rather than restocking every month or two. Less suited to anyone whose doctor has recommended a higher dose for a diagnosed deficiency.
Strengths and trade-offs
Drawn from this product's published specifications.
- 300 tablets, near a year's supply
- Gluten free formula
- Standard 1000 IU maintenance dose
- Plain unflavored tablet, no extras
- 1000 IU may be low for correcting deficiency
- No review data available for this listing
Performance notes
Cholecalciferol (D3) is converted by the liver and kidneys into the active form the body uses for calcium absorption and immune function, the same pathway triggered by sunlight on skin.
Specifications
| Brand | NATURE |
|---|---|
| Model | 2683 |
| Form | Tablet |
| Supplement Type | Vitamin D3 |
| Count | 300 |
| Flavor | Unflavored |
| Benefits | Bone Support, Immune System Support |
| Diet | Gluten Free |
| Allergens | Gluten Free |
Other NATURE vitamin d
How it compares
This product against the closest alternatives we track in vitamin d.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Nature Made Vitamin D3 1000 IUThis product | 4.8 / 5 | 5,200 | 4.7 / 5 |
| Nature's Bounty Vitamin D3 5000 IU SoftgelsNature's | 4.8 / 5 | 83,500 | 4.7 / 5 |
| Sports Research Vitamin D3 5000 IU with Coconut MCT OilSports | 4.8 / 5 | 71,400 | 4.7 / 5 |
| vitafusion Vitamin D3 GummiesVitafusion | 4.8 / 5 | 54,500 | 4.7 / 5 |
| NOW Foods SupplementsNow | 4.8 / 5 | 51,000 | 4.7 / 5 |
Similar vitamin d from other brands
Questions about the NATURE 2683
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How long does one bottle of Nature Made Vitamin D3 1000 IU last?
At one tablet a day, 300 tablets covers roughly 300 days.
Is this D3 or D2?
It is D3 (cholecalciferol), listed at 1000 IU (25 mcg) per tablet.
Is Nature Made Vitamin D3 gluten free?
Yes, the listing states the formula is gluten free.