Nature Made Vitamin D3 2000 IU
- Vitamin D
- Tablet
- Vitamin D3
- 400
- More reviewed than 91%
The bulk version of a 2000 IU vitamin D3 tablet, sized for a full year-plus of daily use rather than a trial-sized bottle.
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How it ranks among the 137 vitamin d we track
4.7★ across 25,100 Amazon ratings, Bayesian-smoothed toward the category average.
25,100 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
10,000+ 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's larger Vitamin D3 bottle provides 2000 IU (50 mcg) per tablet across 400 tablets, marketed as a full 400 day supply for bone, teeth, muscle, and immune health.
This is the same 2000 IU per tablet strength as Nature Made's 220-count version, just scaled up to a 400 day supply so buyers who take it daily do not have to reorder as often. The gluten-free label carries over, and the larger count is the main difference worth weighing against price per tablet.
- 400 tablets per bottle
- 2000 IU (50 mcg) vitamin D3 per tablet
- Marketed as a 400 day supply
- Gluten free
Who it's for
People already committed to a daily 2000 IU vitamin D3 routine who want to buy in bulk and skip frequent reordering. Not useful for anyone wanting a smaller bottle to try the dose first.
Strengths and trade-offs
Drawn from this product's published specifications.
- 2000 IU (50 mcg) vitamin D3 per tablet
- 400 tablets, a 400 day supply at one a day
- Large bottle size is a bigger upfront commitment than smaller counts
Performance notes
Vitamin D3 at 2000 IU per tablet supports bone, teeth, muscle, and immune health through consistent daily intake, and the 400-tablet count is built around a 400 day supply at one tablet per day. The gluten-free tablet format is a manufacturing detail rather than a change in dose or effect.
Specifications
| Brand | NATURE |
|---|---|
| Model | 2818 |
| Form | Tablet |
| Supplement Type | Vitamin D3 |
| Count | 400 |
| Flavor | Unflavored |
| Benefits | Bone & Joint Support, Immune 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 2000 IUThis product | 4.7 / 5 | 25,100 | 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 2818
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How long does this bottle last?
It is sized as a 400 day supply at one tablet per day.
How much vitamin D3 is in each tablet?
2000 IU, equal to 50 mcg, per tablet.
Is this the same strength as Nature Made's smaller D3 bottle?
Yes, both provide 2000 IU per tablet; this version simply comes in a larger 400-count bottle.