Rule 1 o
Rule 1 o has a SupplementChecker.co trust score of 75/100, earning a grade of B+ and a LOW risk level. Rule 1 o claims to conduct third-party testing, but does not specify which program they use. This brand has a clean FDA record, with no warning letters or recalls.
Rule 1 o Trust Summary
- Trust Score
- 75/100 (Good)
- Grade
- B+
- Risk Level
- LOW
- Third-Party Tested
- Yes (self-reported)
- FDA Recalls
- 0
- Adverse Events
- 0
Rule 1 o 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 Rule 1 o
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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 Rule 1 o Third-Party Tested?
Yes — Rule 1 o is Third-party tested. This means an independent laboratory has verified that the products' contents, purity, and potency match their label claims.
Is Rule 1 o a Good Brand?
Rule 1 o scores 75/100 (B+) — this is an average score. There may be room for improvement in testing transparency or certifications. Rule 1 o 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 Rule 1 o
Rule 1 o is a US-based supplement brand operating independently. The company's founding date is unknown. They offer a range of supplements in the specialty category.
Product Specialization
Rule 1 o specializes in specialty supplements. While specific product types are not detailed, this category suggests a focus on niche or targeted formulations.
Testing & Certifications Explained
Rule 1 o claims that their products are third-party tested, but does not specify which third-party testing program they use. This means that while they assert independent verification of their products, there's no readily available way for consumers to verify these claims or understand the rigor of the testing process. Consumers seeking third-party tested supplements may prefer brands with clearly identifiable and reputable certification programs.
How Rule 1 o Compares
Compared to brands like Optimum Nutrition (trust score 82/100) which has undergone NSF certification, Rule 1 o's lack of disclosed certification affects its standing. Myprotein (trust score 70/100) also claims third-party testing. Rule 1 o's trust score places it in a similar range, but the absence of verifiable certifications is a differentiating factor.
Buying Guidance
Given Rule 1 o's B+ grade and claim of third-party testing, consumers can consider their products. However, it's advisable to seek further information on their testing protocols. Purchase from reputable retailers to ensure product authenticity.
Frequently Asked Questions
Has Rule 1 o had any recalls?
Are Rule 1 o supplements third-party tested?
Is Rule 1 o safe?
Is Rule 1 o 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