Is Thorne protein third-party tested?
Last reviewed 2026-10-11. Every certificate entry below was read in the programme's own directory on the date printed beside it, and each links its source. Product label figures come from the product data, read 2026-08-30.
Yes. NSF Certified for Sport lists Thorne Whey Protein Isolate (chocolate and vanilla) and Thorne Plant Protein (chocolate and vanilla).
Certificates, programme by programme
| Programme | Result | Checked |
|---|---|---|
| NSF Certified for Sport | Listed (4 protein entries shown below) | 2026-10-11 |
| Informed Choice | No entry found | 2026-10-11 |
| Clean Label Project | No entry found | 2026-10-11 |
NSF Certified for Sport: listed
Checked 2026-10-11 in the NSF Certified for Sport directory.
- Thorne Whey Protein Isolate Chocolate Flavored (30.2 g, 906 g)
- Thorne Whey Protein Isolate Vanilla Flavored (29.7 g, 906 g)
- Thorne Plant Protein (Chocolate Flavored) (676 g)
- Thorne Plant Protein (Vanilla Flavored) (630 g)
NSF files Thorne under two brand names, Thorne and Thorne®; both were searched.
Informed Choice: no entry found
Checked 2026-10-11: no entry for this brand in the Informed Choice directory (searched by brand; the brand filter named 202 brands on the check date). That is a statement about what the programme publishes, not a finding about the product.
Clean Label Project: no entry found
Checked 2026-10-11: no entry for this brand in the Clean Label Project directory (read the certified-brand index, which named 154 brands on the check date). That is a statement about what the programme publishes, not a finding about the product.
The products we track
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you — commission never changes a ranking or a verdict (how this site is funded).
- Thorne Plant Protein, Chocolate, 676 g, 22 g protein a serving — independent certification. Match to the certificate: exact. Amazon →
- Thorne Plant Protein, Vanilla, 630 g, 22 g protein a serving — independent certification. Match to the certificate: exact. Amazon →
- Thorne Whey Protein Isolate, Chocolate, 906 g, 21 g protein a serving — independent certification. Match to the certificate: exact. Amazon →
- Thorne Whey Protein Isolate, Vanilla, 837 g, 21 g protein a serving — independent certification. Match to the certificate: partial. Amazon →
A certificate covers the package sizes its listing names. Read the size on the listing against the tub you are offered. Exact Amazon links go only to listings sold by Amazon.com; the others are searches.
The Amazon listings for these tubs were sold by Pattern., a third-party seller, on 2026-10-11, so this page links a search and not a listing.
Read next
- Every protein product we checked, with its certificate and package-size match
- Third-party-tested vegan protein powder
- Protein powder and heavy metals: what each certification tests and publishes
This page restates published testing records with attribution. It makes no health, benefit or treatment claim, and says nothing about whether any product is safe or good for you. A certification record describes tested lots, not a permanent grade.
Some links on this page are affiliate links: as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Which products appear here was settled by the certifier's records before any link was attached, and products we could not verify are linked under a plainly different button. Full disclosure.
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