Is Muscle Feast Third-Party Tested? Here's What the Evidence Shows

January 8, 2026 •

4 min read

According to a 2022 FDA warning letter, Muscle Feast had serious violations of Current Good Manufacturing Practice (CGMP) regulations, highlighting the importance of thorough scrutiny of supplement brands. However, Muscle Feast has publicly stated that it utilizes third-party lab testing and has obtained certifications for many of its products since then.

Quick Summary

Muscle Feast has publicly claimed to use third-party testing for its products to ensure purity and potency. A look at independent sources reveals certifications for specific products from Labdoor and the use of Creapure, which is third-party tested. Past FDA warning letters and class-action lawsuits regarding specific product claims and manufacturing issues raise questions about overall quality control.

Key Points

Third-Party Testing Claimed: Muscle Feast states on its website and product pages that it uses third-party labs, like MVTL and Eurofins, to test both raw ingredients and finished products for purity and potency.
Independent Certification: Some Muscle Feast products, such as certain protein powders, have been independently certified for quality by organizations like Labdoor.
Creapure Ingredient: Muscle Feast utilizes Creapure creatine monohydrate, a branded ingredient produced in Germany under GMP standards and independently verified for high purity.
Past FDA Violations: An FDA warning letter from July 2022 cited Muscle Feast for "serious violations" of Current Good Manufacturing Practice (CGMP) regulations, including insufficient testing and verification procedures.
Class-Action Lawsuit: A 2023 class-action lawsuit alleged that the company mislabeled its 8-Hour Energy Pre-Workout as "All-Natural," citing an independent lab test that found a synthetic ingredient.
Verification Varies by Product: While some products have independent verification, it is crucial to research each specific Muscle Feast product, as certifications and testing standards may not apply universally across the brand.
Consumer Vigilance is Key: The history of FDA warnings and lawsuits suggests consumers should combine Muscle Feast's self-reported information with independent verification checks for specific batches or products.

Muscle Feast and the Quest for Purity and Potency

When searching for dietary supplements, the phrase "third-party tested" is a powerful marker of a company's commitment to quality. For Muscle Feast, the landscape of quality assurance includes public claims of third-party testing, independent certifications for certain products, and a history of manufacturing issues cited by the FDA. This article will delve into the details surrounding Muscle Feast's testing practices to provide a clearer picture for consumers.

Muscle Feast's Stated Testing Procedures

Muscle Feast’s official website and product descriptions often feature claims of rigorous quality control and third-party testing. For example, descriptions for their Whey Protein Isolate and Creapure Creatine explicitly mention third-party testing. The company outlines a process where they send samples of raw ingredients to independent labs, like MVTL and Eurofins, for evaluation before manufacturing begins. A final product test is then conducted to ensure compliance with specifications. This commitment to testing both ingredients and final products suggests a comprehensive approach to quality.

Independent Verifications and Certifications

While a company's own claims are a good starting point, independent verification adds a layer of trust. Several Muscle Feast products have received quality ratings from independent testing organization, Labdoor. Labdoor analyzes supplements to verify ingredient accuracy and test for contaminants. Muscle Feast products that have received Labdoor certification include their 100% Whey Protein and Hormone Free Grass Fed Whey Isolate. Furthermore, their use of Creapure creatine, a brand of creatine monohydrate manufactured in Germany, is notable. Creapure is produced under strict GMP standards and verified at ≥99.9% purity. This ingredient-level certification provides an additional layer of assurance for specific products.

Examining Past Quality Control Issues

Not all of Muscle Feast's history paints a perfect picture. A significant point of concern is the FDA warning letter issued to Muscle Feast, LLC in July 2022. The letter detailed "serious violations of FDA’s regulations for Current Good Manufacturing Practice (CGMP)". These violations included failing to properly confirm the identity of components and not verifying that finished products met specifications for identity, purity, strength, and composition.

Another instance of quality control questions arose from a class-action lawsuit filed in February 2023. The lawsuit alleged that Muscle Feast falsely advertised its 8-Hour Energy Pre-Workout as "All-Natural" despite containing synthetic DL malic acid. This was reportedly confirmed through independent third-party lab testing. Both the FDA warning letter and the lawsuit highlight that despite their stated testing practices, Muscle Feast has had documented issues with quality assurance and transparency in the past.

Comparison of Muscle Feast Quality Assurance


Quality Indicator	Muscle Feast	Industry Standard (e.g., NSF Certified)
Third-Party Testing	Yes (claimed); specific products certified by Labdoor and use Creapure.	Yes; verified by major, reputable organizations like NSF or Informed-Sport.
cGMP Compliance	Yes (claimed, but cited for violations in 2022 by FDA).	Verified adherence to cGMP by third-party auditors.
Banned Substances	Creapure ingredient is tested.	Verified free of banned substances through robust testing protocols.
Label Accuracy	Varies; independent testing for some products but faced class-action over 'all-natural' claim.	Consistently verified by independent testing programs.

How to Verify for Yourself

For consumers, it is crucial to move beyond marketing claims and conduct personal due diligence. Here's how to proceed when evaluating Muscle Feast products:

Look for certification logos: Check the product packaging for logos from reputable third-party certifiers like NSF, Informed-Sport, or Labdoor. Not all Muscle Feast products may be certified, so check each one individually.
Check the batch number: For certifications like Informed-Sport, you can often verify the specific batch number on the certifier's website to ensure the product you hold was tested.
Search for Certificates of Analysis (COAs): Reputable companies often make COAs publicly available on their website, providing detailed lab results for each product batch.
Consider product-specific details: Be mindful that Muscle Feast's quality may vary across its product line. Certifications like Creapure apply to the specific ingredient, not necessarily the entire final product formulation.

The Importance of Ongoing Vigilance

While Muscle Feast has demonstrated efforts to implement third-party testing and obtain specific certifications, the past FDA warning and class-action suit underscore the need for constant consumer vigilance. A company's commitment to quality should be ongoing, with a track record of consistent compliance. The history with the FDA, while from 2022, serves as a reminder that prior issues can be a data point to consider when assessing a brand's overall reliability. Consumers must weigh this history against current certifications and testing claims. The presence of third-party certifications like those from Labdoor and the use of independently verified ingredients like Creapure are positive indicators for specific products, but do not guarantee blanket quality across the entire brand.

Conclusion

In summary, the answer to the question "is Muscle Feast third-party tested?" is nuanced. The company has publicly stated its use of third-party testing for raw materials and finished products. Furthermore, specific products have received certification from independent organizations like Labdoor, and the use of the independently tested Creapure creatine is a strong positive. However, past regulatory issues, including a 2022 FDA warning letter concerning cGMP violations and a 2023 class-action lawsuit over mislabeled ingredients, necessitate careful consumer consideration. The prudent approach is to verify individual product certifications through independent bodies and to assess the company's full history, balancing their recent transparency claims against past compliance issues.

This article reflects publicly available information up to October 22, 2025. Consumers should always perform their own research and consult with a healthcare professional before starting any new supplement regimen.

Frequently Asked Questions

Specific products, such as certain whey protein and creatine products, have received independent verification. For instance, Labdoor has certified Muscle Feast's 100% Whey Protein and Hormone Free Grass Fed Whey Isolate for quality. Additionally, the brand uses the independently tested Creapure ingredient in its creatine products.

Creapure is a branded, high-purity creatine monohydrate produced in Germany under strict manufacturing standards. It is independently tested for contaminants and purity, providing an additional layer of assurance for Muscle Feast products that contain it.

Yes, an FDA warning letter issued in July 2022 cited the company for "serious violations" of Current Good Manufacturing Practice (CGMP) regulations. These violations included failing to adequately test raw materials and verify finished product specifications.

The best approach is to check for specific certification logos from reputable third-party testing organizations like Labdoor, Informed-Sport, or NSF on the product label. You can also check the certification body's website, often using a batch number, to confirm a product's tested status.

A class-action lawsuit filed in February 2023 alleged that Muscle Feast mislabeled its 8-Hour Energy Pre-Workout as "All-Natural." Independent third-party lab testing, as cited in the lawsuit, allegedly confirmed the presence of synthetic DL malic acid in the product.

Not necessarily. The 2022 warning letter addressed specific violations in manufacturing processes observed at that time. While it indicates past issues with quality control, it does not mean every product is unsafe. Subsequent efforts, including specific product certifications and public transparency statements, should also be considered.

The consistency of quality standards across all products can be difficult to verify. While the company claims a commitment to quality and testing, individual products may have different certifications. For example, some may be Labdoor-certified, while others may not.