Grade: B+

LOW RISK

One Line Supplements

Item: One Line Supplements
Rating: 75
Author: SupplementChecker

One Line Supplements has a Trust Score of 75/100, earning a grade of B+ and a LOW risk level. One Line Supplements claims to conduct third-party testing, though specific certifications are not listed. This brand has a clean FDA record, with no warning letters or recalls.

One Line Supplements Trust Summary

Trust Score: 75/100 (Good)
Grade: B+
Risk Level: LOW
Third-Party Tested: Yes (self-reported)
FDA Recalls: 0
Adverse Events: 0

One Line Supplements has a trust score of 75/100 (Good). The brand is claims third-party testing (self-reported), has no FDA recalls on record and no adverse event reports.

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Red Flags

⚠No GMP certification visible

Verified Strengths

✓Claims third-party testing
✓Clean FDA record — no warnings, recalls, or significant adverse events

Certifications

Third-Party Tested

Third-party testing means an independent laboratory has verified this product's contents, purity, and potency match what's on the label.

FDA Record

FDA Warning Letters

Recalls

Adverse Reports

Clean record — no FDA warnings, recalls, or significant adverse events.

Is One Line Supplements Third-Party Tested?

Yes — One Line Supplements is Third-party tested. This means an independent laboratory has verified that the products' contents, purity, and potency match their label claims.

Is One Line Supplements a Good Brand?

One Line Supplements scores 75/100 (B+) — this is an average score. There may be room for improvement in testing transparency or certifications. One Line Supplements has a clean FDA record with no warnings or recalls. The brand holds third-party certifications (Third-party tested), which is a strong quality indicator.

About One Line Supplements

One Line Supplements is an independent supplement company with an unknown founding date. Headquartered in the US, they offer a range of supplements. The company operates independently and is not part of a larger parent organization.

Product Specialization

One Line Supplements focuses on herbal and protein supplements. While specific product lines are not detailed, they likely offer a variety of protein powders and herbal remedies.

Testing & Certifications Explained

One Line Supplements claims to use third-party testing, but does not specify which certifications they hold. Without a recognized third-party certification, it is difficult for consumers to independently verify the quality and purity of One Line Supplements products. Consumers should seek out third-party tested supplements from brands that provide verifiable proof of testing.

How One Line Supplements Compares

Compared to competitors like Transparent Labs (Trust Score: 92/100, third-party tested and publishes lab results) and Klean Athlete (Trust Score: 88/100, NSF Certified for Sport), One Line Supplements' Trust Score is lower. Garden of Life (Trust Score: 70/100, many certifications) also has a lower score, but has many certifications. The lack of disclosed ingredient sourcing and published lab results puts One Line Supplements behind brands that prioritize transparency.

Buying Guidance

Given One Line Supplements' Trust Score and lack of verifiable certifications, consumers should exercise caution. Purchase directly from the One Line Supplements website or authorized retailers to minimize the risk of counterfeit products. Always check for batch-specific lab results if available, and consider choosing brands with more transparent testing practices.

Frequently Asked Questions

Has One Line Supplements had any recalls?

No — as of 2026, One Line Supplements has zero FDA product recalls on record. They maintain a clean FDA record with no warning letters or significant adverse event reports. One Line Supplements received a trust score of 75/100 from SupplementChecker.

Are One Line Supplements supplements third-party tested?

Yes — One Line Supplements supplements are third-party tested. They hold the following certifications: third-party tested (self-reported). Third-party testing means an independent lab has verified the product's contents, purity, and potency match the label claims.

Is One Line Supplements safe?

One Line Supplements received a trust score of 75/100 (grade: B+, risk level: LOW). This score is calculated from FDA records, third-party certifications, adverse event reports, and transparency practices. No FDA warnings or recalls are on record.

Grade A+ • Higher score

Want more comparisons? Browse our supplement categories or check our buying guides.

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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Quick Facts

Trust Score: 75/100
Grade: B+
Risk Level: LOW
Third-Party Tested: Yes
FDA Recalls: 0
Adverse Reports: 0

⚠ No GMP certification visible