Grade: C

MEDIUM RISK

Signature Supplements

Item: Signature Supplements
Rating: 50
Author: SupplementChecker

Signature Supplements has a SupplementChecker.co trust score of 50/100, a grade of C, indicating a MEDIUM risk level. Signature Supplements does not appear to conduct third-party testing on their products. Consumers should be aware of the lack of independent verification when considering Signature Supplements.

Signature Supplements Trust Summary

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

Signature Supplements 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 Signature Supplements Third-Party Tested?

No — Signature Supplements 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 Signature Supplements a Good Brand?

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

About Signature Supplements

Signature Supplements is an independent supplement brand operating in the US. The company's founding date is unknown. They offer a range of supplements across various categories. Signature Supplements aims to provide accessible supplements to a broad consumer base.

Product Specialization

Signature Supplements offers products in the herbal, minerals, protein, and vitamins categories. They provide a variety of vitamin and mineral supplements, as well as protein powders and herbal extracts. Specific product lines and bestsellers are not publicly available.

Testing & Certifications Explained

Signature Supplements does not have any third-party testing certifications on record. This means there is no independent organization verifying the quality, purity, or potency of their products. Consumers should be aware that the claims made on Signature Supplements' labels have not been independently validated. The absence of GMP certification is also notable.

How Signature Supplements Compares

Compared to brands like NOW Foods (trust score 75/100) and Thorne Research (trust score 90/100), Signature Supplements' trust score is significantly lower. Both NOW Foods and Thorne Research conduct extensive third-party testing and hold numerous certifications. Another competitor, Nature Made (trust score 65/100), also has more visible certifications than Signature Supplements. This difference highlights the importance of independent verification in the supplement industry.

Buying Guidance

Given Signature Supplements' trust score and lack of third-party testing, consumers should exercise caution. If purchasing Signature Supplements products, buy from reputable retailers and carefully examine the product label. Consider seeking third-party tested supplements from brands with higher trust scores for greater assurance of quality and safety.

Frequently Asked Questions

Has Signature Supplements had any recalls?

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

Are Signature Supplements supplements third-party tested?

No — Signature Supplements 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 Signature Supplements safe?

Signature Supplements 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 Signature Supplements a good brand?

Signature Supplements 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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