THORNE - Vitamin B12 - as Methylcobalamin - Supports Heart & Nerve Health, Blood Cell…
- Vitamin B12
- Capsule
- Vitamin-b
- 60
- Better rated than 87%
- More reviewed than 65%
A third-party certified methylcobalamin B12 capsule from an established supplement brand, aimed at buyers who care about form and manufacturing standards over price.
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How it ranks among the 130 vitamin b12 we track
4.8★ across 3,700 Amazon ratings, Bayesian-smoothed toward the category average.
3,700 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 130 vitamin b12 we track - how the scorecard works · full vitamin b12 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's Vitamin B12 capsule uses the methylcobalamin form of B12, is manufactured gluten, dairy and soy free, and ships third-party certified in a 60-capsule bottle.
Methylcobalamin is the active, coenzyme form of B12 the body can use directly, differing from the cyanocobalamin found in many cheaper B12 products. Thorne is known for third-party tested manufacturing, which the listing reflects through its certification claim.
- Methylcobalamin B12 form
- Third-party certified
- Gluten, dairy and soy free
- 60 vegetarian capsules
Who it's for
Suited to people who specifically want the methylcobalamin form of B12 and value third-party certified manufacturing, including those avoiding gluten, dairy and soy. Not the cheapest route for anyone who just wants a basic B12 supplement without those considerations.
Strengths and trade-offs
Drawn from this product's published specifications.
- Methylcobalamin is the bioactive B12 form
- Third-party certified manufacturing
- Free of gluten, dairy and soy
- 60-capsule count is a shorter supply than bulk B12 options
- No seller description or flavor detail beyond unflavored
Performance notes
Methylcobalamin skips a conversion step the body otherwise performs on cyanocobalamin, which is one reason it's often chosen to support nerve function and methylation.
Specifications
| Brand | THORNE |
|---|---|
| Model | B125 |
| Form | Capsule |
| Supplement Type | Vitamin-b |
| Count | 60 |
| Flavor | Unflavored |
| Benefits | Methylation |
| Diet | Gluten Free |
| Allergens | Dairy Free, Fish Free, Shellfish Free, Soy Free |
How it compares
This product against the closest alternatives we track in vitamin b12.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| THORNE - Vitamin B12 - as Methylcobalamin - Supports Heart & Nerve Health, Blood Cell…This product | 4.8 / 5 | 3,700 | 4.7 / 5 |
| Nature's Bounty Vitamin B12 2500 mcgNature’s | 4.8 / 5 | 26,800 | 4.7 / 5 |
| Nature Made Vitamin B12 1000 mcgNATURE | 4.8 / 5 | 21,400 | 4.7 / 5 |
| Solgar Vitamin B12 1000 mcgSolgar | 4.8 / 5 | 11,500 | 4.7 / 5 |
| Natrol Vitamin B12 5000 mcg Fast Dissolve B12 SupplementNatrol | 4.7 / 5 | 40,300 | 4.6 / 5 |
Similar vitamin b12 from other brands
Questions about the THORNE B125
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What form of B12 does Thorne use in this supplement?
Methylcobalamin, the active coenzyme form of B12.
Is this B12 supplement free of common allergens?
Yes, it's listed as gluten, dairy and soy free.
How many capsules come in the bottle?
60 capsules.