THORNE - Collagen Fit - Unflavored Collagen Peptides Powder with Nicotinamide Riboside…
- Collagen
- Powder
- Collagen Peptides
- 1.11 pounds
- Better rated than 56%
A tested, unflavored collagen and protein powder built for people who care about sport certification as much as the collagen itself.
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How it ranks among the 98 collagen we track
4.6★ across 476 Amazon ratings, Bayesian-smoothed toward the category average.
476 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
5,000+ 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 98 collagen we track - how the scorecard works · full collagen 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 Collagen Fit is an unflavored powder combining 15g of collagen peptides with 14g of protein per serving, plus nicotinamide riboside, in a 17.8 oz tub good for 30 servings. It carries NSF Certified for Sport status, a third party screen for banned substances.
Thorne has built its reputation on supplements tested to that NSF Certified for Sport standard, which matters specifically to competitive athletes who must avoid contaminated products. Being unflavored keeps it neutral for mixing into coffee, smoothies or other recipes instead of locking buyers into one taste. At close to 5000 units bought in the past month, it is a high volume seller in this batch.
- 17.8 oz tub, 30 servings
- 15g collagen peptides per serving
- 14g protein per serving
- NSF Certified for Sport
Who it's for
Athletes and regular gym users who want a tested, unflavored collagen and protein powder to stir into any drink. Less relevant to someone who wants a flavored, ready sweetened collagen shake.
Strengths and trade-offs
Drawn from this product's published specifications.
- 15g collagen peptides and 14g protein per serving
- NSF Certified for Sport for competitive athletes
- Unflavored, mixes into any drink
- No flavor means no built in sweetness for those who dislike plain powder
- Premium brand pricing typical of Thorne's line
Performance notes
Each serving delivers 15g of collagen peptides alongside 14g of protein, plus nicotinamide riboside, combining collagen supplementation with a meaningful protein dose in the same scoop. The NSF Certified for Sport label means the finished product has been screened for banned substances, which is the main reason competitive athletes choose it over uncertified alternatives.
Specifications
| Brand | THORNE |
|---|---|
| Model | SP686 |
| Form | Powder |
| Supplement Type | Collagen Peptides |
| Count | 1.11 pounds |
| Flavor | Unflavored |
Other THORNE collagen
How it compares
This product against the closest alternatives we track in collagen.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| THORNE - Collagen Fit - Unflavored Collagen Peptides Powder with Nicotinamide Riboside…This product | 4.6 / 5 | 476 | 4.4 / 5 |
| Sports Research Collagen PeptidesSports | 4.6 / 5 | 129,448 | 4.6 / 5 |
| Vital Vitamins Multi Collagen Peptides Capsules for Women & MenVital | 4.6 / 5 | 52,236 | 4.6 / 5 |
| Great Lakes Wellness Collagen Peptides PowderGreat | 4.6 / 5 | 37,839 | 4.6 / 5 |
| NativePath Collagen Peptides ProteinNativePath | 4.6 / 5 | 13,800 | 4.6 / 5 |
Similar collagen from other brands
Questions about the THORNE SP686
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How much collagen and protein does Thorne Collagen Fit provide per serving?
Each serving has 15g of collagen peptides and 14g of protein.
Is Thorne Collagen Fit tested for banned substances?
Yes, it is NSF Certified for Sport, a third party screen used by competitive athletes.
How many servings are in the 17.8 oz tub?
The tub is sized for 30 servings.