Is Thorne Research Made in USA?
Last checked Oct 18, 2026 · 14 verified products · see the evidence
Yes — Made in USA
Thorne Research manufactures its products in the United States — specifically in Summerville, SC. Sources: the brand's own website. Each is quoted and dated below. A recent report of a possible change is under review; see below.
American Score
Average American Score across 14 verified products — scores ≥70% are shown on this site.
Manufacturing Details
- Made in
- Summerville, SC
- Headquarters
- Summerville, SC
- Location detail
- Specific city confirmed
- History
- Established brand (10–50 years)
- Founded
- 1984
How we verified Thorne Research
Most recent check: Oct 18, 2026
From the brand's website
“…Carolina, Thorne manufactures supplements in the USA using globally sourced ingredients.”
thorne.com · checked Oct 18, 2026
Amazon listings
We read the live Amazon listing for 14 of the 14 Thorne Research products on this page (most recently Oct 17, 2026). None of them states where the product is made, so these products rely on the brand-level evidence above.
Ongoing monitoring
Under review. A source reports a possible change we are still confirming:
“P&G is acquiring supplement brand Thorne for $3.8 billion.”
cnbc.com · checked Sep 29, 2026
These checks are run by our software on a schedule: brand websites are re-read about every three weeks, Amazon listings weekly, and news is scanned monthly. Every flag is checked against its original source before anything on this page changes. How the American Score works.
About Thorne Research
Thorne Research manufactures supplements in Summerville, South Carolina under NSF Sport certification and puts every product through four rounds of testing before it ships.
The Gold Standard for Purity
Thorne Research was founded in 1984 and has built its reputation on a single principle: supplements should contain exactly what the label says and nothing that isn't listed. The company's manufacturing campus in Summerville, South Carolina is NSF Sport certified — a third-party certification that tests for banned substances and label accuracy against the most demanding standard in the supplements industry.
Every Thorne supplement undergoes four rounds of testing: raw material testing before manufacturing, in-process testing during production, finished product testing, and stability testing for shelf life. This four-step protocol is unusual in the industry and is the basis for Thorne's position as the supplement of choice for professional sports teams and elite athletes who cannot risk positive drug tests.
Made in South Carolina
Thorne's Summerville, South Carolina manufacturing campus gives the company complete control over product quality from raw materials through finished product. The facility handles the full production chain: raw material reception and testing, capsule filling, tablet pressing, packaging, and final quality control. Using globally sourced ingredients but manufacturing entirely in South Carolina.
This vertical integration is what allows the four-round testing protocol to be meaningful: at each step of a fully controlled process, Thorne can intervene if testing reveals a problem. Contract manufacturing — the model used by most supplement brands — introduces hand-offs where this kind of quality control is harder to maintain.
American-Made Thorne Research Products
View all 14 products →
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Frequently Asked Questions
Is Thorne Research made in the USA?
Yes. Thorne Research is made in the United States, manufactured in Summerville, SC. Thorne manufactures supplements at their campus in Summerville, South Carolina, providing total control over product ingredients. Every supplement undergoes four rounds of testing. NSF Sport certified facility. Third-party tested for banned substances. Founded in 1984. Uses globally sourced ingredients but all manufacturing and testing done in Summerville, SC. Gold standard for supplement purity in the USA.
Where is Thorne Research made?
Thorne Research is made in Summerville, SC. The company is headquartered in Summerville, SC.
Which Thorne Research products are made in the USA?
We carry 14 verified American-made Thorne Research products across Health & Personal Care. Every listing links directly to a trusted online store with verified manufacturing evidence.