Grade: C

MEDIUM RISK

OneSource

Item: OneSource
Rating: 50
Author: SupplementChecker

The OneSource trust score is 50/100, a grade of C, indicating a medium risk level. OneSource does not claim to offer third-party tested supplements. Consumers should carefully evaluate OneSource products before purchasing.

OneSource Trust Summary

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

OneSource 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 OneSource Third-Party Tested?

No — OneSource 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 OneSource a Good Brand?

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

About OneSource

OneSource is a US-based specialty supplement brand operating independently. The founding date of OneSource is unknown. They offer products in the specialty supplement category.

Product Specialization

OneSource specializes in specialty supplements. Specific product types are not specified, but the brand focuses on unique or niche formulations.

Testing & Certifications Explained

OneSource does not have any certifications on record and does not claim their products are third-party tested. This means there is no independent organization verifying the quality, purity, or potency of OneSource's supplements. Consumers should be aware that the absence of third-party testing means the brand's claims are not independently verified.

How OneSource Compares

Compared to other brands in the specialty supplement category, OneSource's trust score of 50/100 is lower than brands that prioritize third-party testing. For example, a brand like Klean Athlete (trust score 85/100) has NSF Certified for Sport certification, while Thorne Research (trust score 90/100) publishes extensive lab results. These brands offer greater transparency and independent verification compared to OneSource.

Buying Guidance

Given the OneSource trust score and lack of third-party testing, consumers should exercise caution when considering OneSource products. Purchase directly from the OneSource website or authorized retailers to ensure authenticity. Carefully review product labels and research individual ingredients before use.

Frequently Asked Questions

Has OneSource had any recalls?

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

Are OneSource supplements third-party tested?

No — OneSource 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 OneSource safe?

OneSource 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 OneSource a good brand?

OneSource 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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