Grade: B+

MEDIUM RISK

Thorne

Item: Thorne
Rating: 70
Author: SupplementChecker

https://www.thorne.com Est. 1984 (42 years)

Thorne has a SupplementChecker.co trust score of 70/100, which is a grade of B+ and indicates MEDIUM risk. No third-party testing certifications were found. While Thorne is an established brand, consumers should be aware of the lack of independent verification of their products.

Thorne Trust Summary

Trust Score: 70/100 (Good)
Grade: B+
Risk Level: MEDIUM
Third-Party Tested: No
FDA Recalls: 0
Adverse Events: 2
Years in Business: 42 years
GMP Certified: Yes

Thorne has a trust score of 70/100 (Good). The brand is not third-party tested by NSF, USP, or Informed Sport, has no FDA recalls on record and 2 adverse event reports and has been in business for 42 years.

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Red Flags

⚠No third-party testing certifications found

Verified Strengths

✓Established brand — operating since 1984 (42 years)
✓Clean FDA record — no warnings, recalls, or significant adverse events

Certifications

GMP Certified

GMP certification ensures manufacturing quality standards are met, but does not verify that product contents match the label through independent testing. Look for NSF, USP, or Informed Sport certifications for third-party verified products.

FDA Record

FDA Warning Letters

Recalls

Adverse Reports

Is Thorne Third-Party Tested?

No — Thorne is not currently third-party tested by independent certifiers like NSF, USP, or Informed Sport. They do hold GMP certification, which ensures manufacturing quality but does not independently verify product contents. We recommend looking for brands with verified third-party testing for the highest confidence in product quality. See our guide to third-party tested supplements.

Is Thorne a Good Brand?

Thorne scores 70/100 (B+) — this is an average score. There may be room for improvement in testing transparency or certifications. Thorne has a clean FDA record with no warnings or recalls. The brand does not currently hold third-party testing certifications.

About Thorne

Thorne is a US-based supplement company founded in 1984 and operating independently. They offer a wide range of products, including vitamins, minerals, amino acids, sports nutrition supplements, and specialty formulas. Thorne has been in the supplement market for over four decades.

Product Specialization

Thorne specializes in a variety of supplement categories, including vitamins, minerals, and amino acids. They also offer products in the sports nutrition and specialty supplement areas. Consumers often seek Thorne products for foundational health support.

Testing & Certifications Explained

Thorne is GMP Certified, which means they adhere to Good Manufacturing Practices. However, no third-party testing certifications were found. This means that while Thorne follows manufacturing quality standards, their products are not independently verified for ingredient accuracy, purity, or potency. Consumers should be aware that the absence of third-party testing impacts the "Thorne trust score."

How Thorne Compares

Compared to competitors, Thorne's trust profile presents both strengths and weaknesses. For example, NOW Foods (trust score 85/100) and Garden of Life (trust score 90/100) both have higher trust scores and carry third-party testing certifications. Many consumers read "Thorne reviews" to compare the brand against competitors. Consumers should consider these factors when evaluating "is Thorne a good brand?"

Buying Guidance

Given Thorne's B+ grade and lack of third-party testing, consumers should exercise caution. Purchase Thorne products from reputable retailers to minimize the risk of counterfeits. Consumers concerned about independent verification should consider brands with third-party testing certifications. Many consumers ask "is Thorne safe?" and while their FDA record is clean, the lack of third-party testing is a consideration.

Frequently Asked Questions

Has Thorne had any recalls?

No — as of 2026, Thorne has zero FDA product recalls on record. They maintain a clean FDA record with no warning letters or significant adverse event reports. Thorne received a trust score of 70/100 from SupplementChecker.

Are Thorne supplements third-party tested?

No — Thorne supplements are not currently third-party tested by independent certifiers like NSF, USP, or Informed Sport. They do have GMP (Good Manufacturing Practice) certification, which ensures manufacturing quality but does not independently verify product contents.

Is Thorne safe?

Thorne received a trust score of 70/100 (grade: B+, risk level: MEDIUM). This score is calculated from FDA records, third-party certifications, adverse event reports, and transparency practices. No FDA warnings or recalls are on record.

Is Thorne a good brand?

Thorne scores 70/100 (grade: B+) — this is an average score. There may be room for improvement in testing transparency or certifications. They do not currently hold third-party testing certifications like NSF, USP, or Informed Sport. No FDA warnings or recalls found.

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How We Calculated This Score

Every brand starts with a baseline score of 70/100.

Points added for: Third-party certifications (NSF +15, USP +15, Informed Sport +10), publishing lab results (+10), clean regulatory record (+10), 10+ years in business (+10), organic certification (+5).

Points deducted for: FDA warning letters (-25), product recalls (-20), high adverse events (-15), no third-party testing (-15), proprietary blends (-10), no GMP (-10).

Score is capped at 0-100. Grade and risk level are derived from the final score.

All data sourced from FDA.gov, Health Canada (LNHPD / recalls-rappels), NSF.org, USP.org, and publicly available brand information. Last updated: 4/9/2026.

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