Grade: C

MEDIUM RISK

Musclewerks

Item: Musclewerks
Rating: 50
Author: SupplementChecker

Musclewerks has a Trust Score of 50/100, which is a Grade C and indicates a MEDIUM risk level. Musclewerks does not appear to conduct third-party testing on its supplements. Consumers should carefully evaluate Musclewerks products before purchasing.

Musclewerks Trust Summary

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

Musclewerks 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 Musclewerks Third-Party Tested?

No — Musclewerks 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 Musclewerks a Good Brand?

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

About Musclewerks

Musclewerks is an independent supplement brand operating out of the US. The company's founding date is unknown. Musclewerks focuses on specialty supplements.

Product Specialization

Musclewerks specializes in specialty supplements. Specific product types are not specified, but the company likely focuses on niche products within the broader supplement market.

Testing & Certifications Explained

Musclewerks does not have any visible third-party testing certifications. This means that no independent organization verifies the contents or purity of Musclewerks products. Consumers should be aware that the absence of third-party testing means there is no external validation of the product's label claims or ingredient quality. Therefore, it's difficult to determine if Musclewerks is third-party tested.

How Musclewerks Compares

Compared to brands like Transparent Labs (Trust Score: 95) and Klean Athlete (Trust Score: 88), Musclewerks' trust score is considerably lower. These competitors invest heavily in third-party testing and certifications, providing greater assurance of product quality. Optimum Nutrition (Trust Score: 65) scores higher, due to more transparent testing and certification practices.

Buying Guidance

Given Musclewerks' Trust Score and lack of third-party testing, consumers should exercise caution. Purchase directly from Musclewerks or authorized retailers to ensure product authenticity. Carefully examine product labels and consider seeking advice from a healthcare professional before using Musclewerks supplements.

Frequently Asked Questions

Has Musclewerks had any recalls?

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

Are Musclewerks supplements third-party tested?

No — Musclewerks 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 Musclewerks safe?

Musclewerks 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 Musclewerks a good brand?

Musclewerks 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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