XS
XS has a SupplementChecker.co trust score of 40/100, which translates to a grade of D and a HIGH risk level. No third-party testing certifications were found for XS. This means it's difficult to independently verify the quality and safety of their supplements, so consumers should approach this brand with caution.
XS Trust Summary
- Trust Score
- 40/100 (Below Average)
- Grade
- D
- Risk Level
- HIGH
- Third-Party Tested
- No
- FDA Recalls
- 0
- Adverse Events
- 6
XS has a trust score of 40/100 (Below Average). The brand is not third-party tested by NSF, USP, or Informed Sport, has no FDA recalls on record and 6 adverse event reports.
Where to Buy XS
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Red Flags
- ⚠No third-party testing certifications found
- ⚠No GMP certification visible
Certifications
No certifications on record. This brand has not demonstrated GMP compliance or third-party testing verification.
FDA Record
Is XS Third-Party Tested?
No — XS 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 XS a Good Brand?
XS scores 40/100 (D) — this is a below-average score. We recommend considering brands with third-party certifications like NSF or USP. XS has a clean FDA record with no warnings or recalls. The brand does not currently hold third-party testing certifications.
About XS
XS is a supplements brand operating independently in the US. The founding date of XS is unknown. They offer products in the supplement market.
Product Specialization
XS specializes in protein supplements. Their product line focuses on providing consumers with options for muscle building and performance enhancement.
Testing & Certifications Explained
No third-party testing certifications were found for XS. This means that there is no independent organization verifying the quality, purity, and potency of XS products. Consumers should be aware that the absence of third-party testing makes it more difficult to assess the safety and effectiveness of XS supplements. It is not possible to definitively say if XS is safe without this verification.
How XS Compares
Many brands in the protein supplement category, such as Optimum Nutrition (trust score 75/100) and Garden of Life (trust score 82/100), pursue third-party testing and certifications to demonstrate product quality. These brands often use certifications like NSF Certified for Sport or Informed-Sport. The XS trust score is lower than these competitors, suggesting a need for improvement in transparency and quality assurance.
Buying Guidance
Given the low XS trust score and lack of third-party testing, consumers should exercise caution when considering XS products. If you choose to purchase XS supplements, buy directly from the manufacturer or authorized retailers to minimize the risk of counterfeit products. Research XS reviews and consider alternatives with higher trust scores and verifiable certifications.
Frequently Asked Questions
Has XS had any recalls?
Are XS supplements third-party tested?
Is XS safe?
Is XS a good brand?
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Compare Similar Brands
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Garden of Life Sport
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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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See the best third-party tested supplements →Quick Facts
- Trust Score
- 40/100
- Grade
- D
- Risk Level
- HIGH
- Third-Party Tested
- No
- FDA Recalls
- 0
- Adverse Reports
- 6
Similar Brands
ATP Lab
⚠ 1 product recall(s) on record
EST
⚠ High number of FDA adverse event reports (174)
Persona Nutrition
⚠ No third-party testing certifications found
Beyond Raw
⚠ No third-party testing certifications found
Garden of Life Sport
⚠ No third-party testing certifications found