Grade: C

MEDIUM RISK

Only Protein

Item: Only Protein
Rating: 50
Author: SupplementChecker

Only Protein has a Trust Score of 50/100, which is a Grade C and indicates a MEDIUM risk level. Only Protein does not claim to offer third-party tested supplements. Consumers should be aware of the lack of independent verification when considering Only Protein products.

Only Protein Trust Summary

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

Only Protein 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 Only Protein Third-Party Tested?

No — Only Protein 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 Only Protein a Good Brand?

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

About Only Protein

Only Protein is a US-based specialty supplement brand operating independently. The founding date of Only Protein is unknown. They offer a range of supplements, but their specific market position is not clearly defined.

Product Specialization

Only Protein specializes in specialty supplements. Specific product types are not detailed, but consumers can expect a focus on niche supplement categories.

Testing & Certifications Explained

Only Protein does not have any certifications on record. This means that their products are not independently verified for quality, purity, or potency by a third-party organization. Consumers should be aware that the absence of certifications increases the risk of potential contamination or inaccurate labeling. The question of "is Only Protein third-party tested?" is answered negatively.

How Only Protein Compares

Compared to other brands in the specialty supplement category, Only Protein lags behind in trust and verification. For example, competitor Transparent Labs (Trust Score 92) and Klean Athlete (Trust Score 88) both offer a range of third-party tested supplements and have higher trust scores. These brands provide greater assurance of product quality and safety through independent certifications.

Buying Guidance

Given Only Protein's Trust Score and lack of third-party testing, consumers should exercise caution when considering their products. Purchase directly from Only Protein's website or authorized retailers to ensure product authenticity. Carefully review the ingredient list and consider seeking advice from a healthcare professional before use.

Frequently Asked Questions

Has Only Protein had any recalls?

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

Are Only Protein supplements third-party tested?

No — Only Protein 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 Only Protein safe?

Only Protein 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 Only Protein a good brand?

Only Protein 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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