c/o
c/o has a SupplementChecker trust score of 80/100, which is a Grade A, indicating a low risk level. c/o products are NSF Certified for Sport, meaning they are tested for banned substances. While this is a positive sign, c/o does not publish their lab results.
c/o Trust Summary
- Trust Score
- 80/100 (Very Good)
- Grade
- A
- Risk Level
- LOW
- Third-Party Tested
- Yes (NSF)
- FDA Recalls
- 0
- Adverse Events
- 0
c/o has a trust score of 80/100 (Very Good). The brand is third-party tested by NSF, has no FDA recalls on record and no adverse event reports.
Where to Buy c/o
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Red Flags
- ⚠No GMP certification visible
Verified Strengths
- ✓NSF Certified for Sport — banned substance tested
- ✓Clean FDA record — no warnings, recalls, or significant adverse events
Certifications
Third-party testing means an independent laboratory has verified this product's contents, purity, and potency match what's on the label.
FDA Record
Clean record — no FDA warnings, recalls, or significant adverse events.
Is c/o Third-Party Tested?
Yes — c/o is NSF-certified. This means an independent laboratory has verified that the products' contents, purity, and potency match their label claims.
Is c/o a Good Brand?
c/o scores 80/100 (A) — this is an above-average score indicating a trustworthy brand. c/o has a clean FDA record with no warnings or recalls. The brand holds third-party certifications (NSF-certified), which is a strong quality indicator.
About c/o
c/o is a US-based specialty supplement brand operating independently. The founding date of c/o is unknown. c/o aims to provide specialized supplements to meet specific consumer needs.
Product Specialization
c/o specializes in specialty supplements. While specific product types are not listed, the brand likely focuses on niche areas within the supplement market.
Testing & Certifications Explained
c/o's NSF Certified for Sport certification means that their products have been tested by NSF International, a respected independent organization, to ensure they do not contain unsafe levels of contaminants, prohibited substances, or masking agents. This certification is particularly important for athletes and others concerned about banned substances in supplements. However, it does not guarantee the quality of ingredients or the effectiveness of the product.
How c/o Compares
Compared to brands like Klean Athlete (92/100) which also holds NSF Certified for Sport certification and Garden of Life (65/100) which has certifications for organic ingredients, c/o holds a competitive position with its 'A' grade. However, brands like Klean Athlete often publish their lab results, offering greater transparency.
Buying Guidance
Given c/o's high trust score and NSF Certified for Sport status, consumers can generally feel confident purchasing their products. Look for the NSF Certified for Sport seal on the product label to verify certification. Consumers who prioritize ingredient sourcing transparency may wish to seek alternatives.
Frequently Asked Questions
Has c/o had any recalls?
Are c/o supplements third-party tested?
Is c/o safe?
Is c/o a good brand?
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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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- Trust Score
- 80/100
- Grade
- A
- Risk Level
- LOW
- Third-Party Tested
- Yes
- FDA Recalls
- 0
- Adverse Reports
- 0