THORNE - Vitamin D3 Supplement - Supports Healthy Bones, Teeth, Muscles, Cardiovascular &…
- Vitamin D
- Capsule
- Vitamin D3
- 90
A clean, allergen-conscious D3 capsule at a moderate 1,000 IU dose from a brand known for third-party testing.
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How it ranks among the 137 vitamin d we track
4.8★ across 3,600 Amazon ratings, Bayesian-smoothed toward the category average.
3,600 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
9,000+ 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
Thorne keeps this D3 capsule to a single nutrient, dosed for bone, immune and cardiovascular support and free of dairy, fish, shellfish and soy. Ninety capsules cover about three months at one a day, aimed at anyone maintaining baseline D3 levels rather than correcting a severe deficiency.
Rather than bundling in K2 or calcium, Thorne isolates vitamin D3 here, so the dose is easy to track alongside other supplements. The capsule is unflavored and free of dairy, fish, shellfish and soy, a broader allergen list than most D3 products state. Ninety servings works out to a standard three-month bottle.
- 1,000 IU vitamin D3 per capsule
- 90 capsules, about a 3-month supply
- Free of dairy, fish, shellfish, soy and gluten
- Unflavored capsule
Who it's for
Works for people who want a plain D3 capsule without added nutrients and who need it free of common allergens. Not the choice for anyone specifically looking for a D3-plus-K2 combination formula.
Strengths and trade-offs
Drawn from this product's published specifications.
- Free of dairy, fish, shellfish and soy
- Single-nutrient formula, easy to dose alongside others
- 90-day supply per bottle
- 1,000 IU is a moderate, not high-potency dose
- No K2 or calcium included in this formula
Performance notes
Each capsule supplies 1,000 IU of vitamin D3, which the label ties to bone, joint, cardiovascular and immune function support. At one capsule daily, the 90-count bottle lasts about three months.
Specifications
| Brand | THORNE |
|---|---|
| Model | D128 |
| Form | Capsule |
| Supplement Type | Vitamin D3 |
| Count | 90 |
| Flavor | Unflavored |
| Benefits | Supports Bone & Joint Heart & Vessels Immune* |
| Diet | Gluten Free |
| Allergens | Dairy Free, Fish Free, Shellfish Free, Soy Free |
Other THORNE vitamin d
How it compares
This product against the closest alternatives we track in vitamin d.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| THORNE - Vitamin D3 Supplement - Supports Healthy Bones, Teeth, Muscles, Cardiovascular &…This product | 4.8 / 5 | 3,600 | 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 |
| Nature Made Vitamin D3 5000 IUNATURE | 4.8 / 5 | 67,100 | 4.7 / 5 |
| vitafusion Vitamin D3 GummiesVitafusion | 4.8 / 5 | 54,500 | 4.7 / 5 |
Similar vitamin d from other brands
Questions about the THORNE D128
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What dose of vitamin D3 is in Thorne's D3 supplement (D128)?
Each capsule provides 1,000 IU of vitamin D3.
Is this product free of common allergens?
Yes, it is labeled free of dairy, fish, shellfish, soy and gluten.
How many capsules come in a bottle?
The bottle contains 90 capsules, a roughly three-month supply at one per day.