THORNE - Vitamin D-5,000 - Vitamin D3 Supplement - Supports Healthy Bones, Teeth &…
- Vitamin D
- Capsule
- Vitamin-d
- 60
- More reviewed than 78%
A 5,000 IU vitamin D3 capsule with NSF Certified for Sport testing, the clearest reason to choose this over a cheaper vitamin D3 is competing under anti-doping rules or wanting that level of batch testing.
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How it ranks among the 137 vitamin d we track
4.8★ across 9,300 Amazon ratings, Bayesian-smoothed toward the category average.
9,300 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
20,000+ 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 Vitamin D-5,000 is a 60-capsule vitamin D3 supplement dosed at 5,000 IU per capsule and NSF Certified for Sport, a distinction that matters for athletes subject to drug testing.
The NSF Certified for Sport label means each batch is tested for banned substances and checked against its label claims, setting it apart from most vitamin D3 products that carry no such screening. At 60 capsules, the bottle runs roughly two months at one capsule daily.
- 5,000 IU vitamin D3 per capsule
- NSF Certified for Sport tested
- Gluten, dairy, soy and shellfish free
- 60 capsules, about a two-month supply
Who it's for
Aimed at athletes and anyone under sport drug-testing rules who still wants a high-dose vitamin D3, plus buyers who value third-party certification generally. Less relevant to someone with no need for sport certification who just wants the lowest cost 5,000 IU option.
Strengths and trade-offs
Drawn from this product's published specifications.
- NSF Certified for Sport batch testing
- 5,000 IU vitamin D3 per capsule
- Gluten free, dairy free, soy free and shellfish free
- Roughly a two-month supply at 60 capsules
- Two-month supply is shorter than larger multi-hundred count bottles from other brands
- Sport certification typically raises the price versus uncertified options
- Capsule only, no liquid or gummy alternative in this listing
Performance notes
The 5,000 IU dose works the same as other high-potency vitamin D3 products, but the NSF Certified for Sport program adds batch testing for banned substances and label-accuracy verification that most supplements skip. That testing is the practical difference buyers are paying for here, not a different form of vitamin D.
Specifications
| Brand | THORNE |
|---|---|
| Model | D138 |
| Form | Capsule |
| Supplement Type | Vitamin-d |
| Count | 60 |
| Flavor | Unflavored |
| Benefits | Supports Bone & Joint Heart & Vessels Immune Sports Performance* |
| 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 D-5,000 - Vitamin D3 Supplement - Supports Healthy Bones, Teeth &…This product | 4.8 / 5 | 9,300 | 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 D138
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What does NSF Certified for Sport mean on Thorne Vitamin D-5,000?
It means the product is third-party tested for banned substances and checked against its label claims, a standard commonly used by athletes subject to drug testing.
How many capsules are in the Thorne D138 bottle?
The bottle contains 60 capsules, roughly a two-month supply at one per day.
Is Thorne Vitamin D-5,000 free of common allergens?
It is listed as gluten free, dairy free, soy free and shellfish free.