Grade: C

MEDIUM RISK

First Endurance

Item: First Endurance
Rating: 50
Author: SupplementChecker

First Endurance has a Trust Score of 50/100, which translates to a grade of C and a MEDIUM risk level. Notably, we found no evidence that First Endurance products are third-party tested for purity or potency. This lack of independent verification is a key factor in their trust score.

First Endurance Trust Summary

Trust Score: 50/100 (Fair)
Grade: C
Risk Level: MEDIUM
Third-Party Tested: No
FDA Recalls: 0
Adverse Events: 0

First Endurance has a trust score of 50/100 (Fair). The brand is not third-party tested by NSF, USP, or Informed Sport, has no FDA recalls on record and no adverse event reports.

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Red Flags

⚠No third-party testing certifications found
⚠No GMP certification visible

Verified Strengths

✓Clean FDA record — no warnings, recalls, or significant adverse events

Certifications

No certifications on record. This brand has not demonstrated GMP compliance or third-party testing verification.

FDA Record

FDA Warning Letters

Recalls

Adverse Reports

Clean record — no FDA warnings, recalls, or significant adverse events.

Is First Endurance Third-Party Tested?

No — First Endurance is not currently third-party tested by independent certifiers like NSF, USP, or Informed Sport. No GMP certification was found on record either. 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 First Endurance a Good Brand?

First Endurance scores 50/100 (C) — this is a below-average score. We recommend considering brands with third-party certifications like NSF or USP. First Endurance has a clean FDA record with no warnings or recalls. The brand does not currently hold third-party testing certifications.

About First Endurance

First Endurance is a US-based supplement brand operating independently. The founding date of First Endurance is unknown. They focus on developing products for endurance athletes.

Product Specialization

First Endurance specializes in the 'specialty' supplement category, offering products tailored for endurance sports. These products may include supplements for hydration, energy, and recovery.

Testing & Certifications Explained

We found no evidence that First Endurance products undergo third-party testing or are certified by independent organizations. This means there's no readily available independent verification of the products' ingredients, potency, or purity. Consumers seeking third-party tested supplements should be aware that First Endurance does not currently provide this assurance.

How First Endurance Compares

Compared to competitors like Klean Athlete (Trust Score 75/100) and Garden of Life (Trust Score 82/100), First Endurance's Trust Score is considerably lower, largely due to the absence of third-party certifications. These competitors often invest in certifications like NSF Certified for Sport or Informed-Sport, providing greater assurance to consumers. Other brands like NOW Foods (Trust Score 68/100) also publish lab results, which First Endurance does not.

Buying Guidance

Given the lack of third-party testing, consumers should carefully consider whether First Endurance aligns with their needs. If purchasing First Endurance products, buy directly from the manufacturer or authorized retailers to minimize the risk of counterfeit products. Always scrutinize the ingredient list and be aware that label claims have not been independently verified.

Frequently Asked Questions

Has First Endurance had any recalls?

No — as of 2026, First Endurance has zero FDA product recalls on record. They maintain a clean FDA record with no warning letters or significant adverse event reports. First Endurance received a trust score of 50/100 from SupplementChecker.

Are First Endurance supplements third-party tested?

No — First Endurance supplements are not currently third-party tested by independent certifiers like NSF, USP, or Informed Sport. No independent testing or GMP certification was found on record.

Is First Endurance safe?

First Endurance received a trust score of 50/100 (grade: C, 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 First Endurance a good brand?

First Endurance scores 50/100 (grade: C) — this is below average. We recommend looking for brands with third-party certifications like NSF or USP. 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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