Guthy-Renker
Guthy-Renker has a SupplementChecker.co trust score of 75/100, which is a Grade of B+ and indicates a LOW risk level. Guthy-Renker claims their products are third-party tested, though the specific testing body is not identified. While they have a clean FDA record, they do not publish lab results or disclose ingredient sourcing.
Guthy-Renker Trust Summary
- Trust Score
- 75/100 (Good)
- Grade
- B+
- Risk Level
- LOW
- Third-Party Tested
- Yes (self-reported)
- FDA Recalls
- 0
- Adverse Events
- 0
Guthy-Renker has a trust score of 75/100 (Good). The brand is claims third-party testing (self-reported), has no FDA recalls on record and no adverse event reports.
Where to Buy Guthy-Renker
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Red Flags
- ⚠No GMP certification visible
Verified Strengths
- ✓Claims third-party testing
- ✓Clean FDA record — no warnings, recalls, or significant adverse events
Certifications
Third-party testing means an independent laboratory has verified this product's contents, purity, and potency match what's on the label.
FDA Record
Clean record — no FDA warnings, recalls, or significant adverse events.
Is Guthy-Renker Third-Party Tested?
Yes — Guthy-Renker is Third-party tested. This means an independent laboratory has verified that the products' contents, purity, and potency match their label claims.
Is Guthy-Renker a Good Brand?
Guthy-Renker scores 75/100 (B+) — this is an average score. There may be room for improvement in testing transparency or certifications. Guthy-Renker has a clean FDA record with no warnings or recalls. The brand holds third-party certifications (Third-party tested), which is a strong quality indicator.
About Guthy-Renker
Guthy-Renker is an independent company with headquarters in the US. The founding date is unknown. They develop and market a range of products, primarily in the health and wellness space.
Product Specialization
Guthy-Renker focuses on vitamins. They offer a variety of formulations.
Testing & Certifications Explained
Guthy-Renker claims their products undergo third-party testing, but does not specify which third-party performs the tests. This means that while testing may occur, consumers cannot independently verify the testing protocols or results. For consumers seeking independently verified products, look for brands that use established third-party testing programs.
How Guthy-Renker Compares
Compared to competitors like Nature Made (trust score 82/100, USP verified) and NOW Foods (trust score 88/100, Informed Sport certified), Guthy-Renker's trust score is lower, and they lack a clearly defined third-party certification. Another competitor, Nutrafol (trust score 68/100), also lacks GMP certification, similar to Guthy-Renker. This puts Guthy-Renker in the middle of the pack in terms of trust and transparency.
Buying Guidance
Consumers can purchase Guthy-Renker products from various online retailers. Before purchasing, check Guthy-Renker reviews and independently verify any specific health claims made about the product. Given the lack of published lab results, consumers should carefully evaluate the ingredient list and consider consulting with a healthcare professional.
Frequently Asked Questions
Has Guthy-Renker had any recalls?
Are Guthy-Renker supplements third-party tested?
Is Guthy-Renker safe?
Is Guthy-Renker a good brand?
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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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- Trust Score
- 75/100
- Grade
- B+
- Risk Level
- LOW
- Third-Party Tested
- Yes
- FDA Recalls
- 0
- Adverse Reports
- 0