THORNE - Vitamin C 1,000 mg Supplement - Supports Healthy Immune Function & Collagen…
- Vitamin C
- Capsule
- Vitamin C
- 60
A third-party certified, single-ingredient 1,000 mg vitamin C capsule from a brand known for lab-checked supplement accuracy.
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How it ranks among the 88 vitamin c we track
4.8★ across 971 Amazon ratings, Bayesian-smoothed toward the category average.
971 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
7,000+ 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 88 vitamin c we track - how the scorecard works · full vitamin c 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 C supplement provides 1,000 mg per serving in 60 capsules, third-party certified and free of gluten, dairy and soy, formulated for immune function and collagen formation support.
Third-party certification is the standout detail here, since it means an outside lab checks label accuracy, a step not all vitamin C products carry. At 1,000 mg per serving, this sits at a common higher-end dose for vitamin C supplements aimed at daily immune support. The listing doesn't specify how many capsules make up one serving, so whether 1,000 mg is per capsule or per multiple capsules isn't confirmed here.
- 1,000 mg vitamin C
- 60 capsules per bottle
- Third-party certified
- Gluten, dairy and soy free
Who it's for
Fits buyers who specifically want third-party certified supplements and a straightforward vitamin C product without other added ingredients. Less relevant for anyone wanting a combination immune formula with zinc or other vitamins included.
Strengths and trade-offs
Drawn from this product's published specifications.
- 1,000 mg vitamin C per serving
- Third-party certified for label accuracy
- Free of gluten, dairy and soy
- Single-ingredient formula with no added zinc or other immune vitamins
- Capsules per serving not specified in the data
Performance notes
Vitamin C at gram-level doses like 1,000 mg is generally taken for immune and collagen support, and third-party certification means the capsule contents were checked against the label by an outside lab rather than the brand alone. Gluten, dairy and soy free labeling addresses common allergen concerns in capsule fillers and coatings.
Specifications
| Brand | THORNE |
|---|---|
| Model | C153 |
| Form | Capsule |
| Supplement Type | Vitamin C |
| Count | 60 |
| Flavor | Unflavored |
| Diet | Gluten Free |
| Benefits | Immune |
Other THORNE vitamin c
How it compares
This product against the closest alternatives we track in vitamin c.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| THORNE - Vitamin C 1,000 mg Supplement - Supports Healthy Immune Function & Collagen…This product | 4.8 / 5 | 971 | 4.5 / 5 |
| Emergen-C 1000mg Vitamin C Powder for Daily Immune Support Caffeine Free Vitamin C…Emergen-C | 4.8 / 5 | 53,857 | 4.7 / 5 |
| Nature's Bounty Vitamin C + Rose HipsNature’s | 4.8 / 5 | 49,343 | 4.7 / 5 |
| Nature Made Extra Strength Vitamin C 1000 mg TabletsNATURE | 4.8 / 5 | 40,190 | 4.7 / 5 |
| Nutricost Vitamin C with Rose Hips 1025mgNutricost | 4.8 / 5 | 23,867 | 4.7 / 5 |
Similar vitamin c from other brands
Questions about the THORNE C153
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How much vitamin C is in each THORNE serving?
1,000 mg per serving.
Is THORNE's Vitamin C third-party certified?
Yes, the listing states it's third-party certified.
Does THORNE's Vitamin C contain dairy or soy?
No, it's listed as gluten, dairy and soy free.