Kirkland Signature vs Nature Made
Side-by-side trust score comparison based on certifications, FDA record, and transparency.
Kirkland Signature scores 5 points higher (80 vs 75).
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| Feature | Kirkland Signature | Nature Made |
|---|---|---|
| Trust Score | 80/100 | 75/100 |
| Grade | A | B+ |
| Risk Level | LOW | LOW |
| NSF Certified | ✗ | ✗ |
| USP Verified | ✓ | ✓ |
| Informed Sport | ✗ | ✗ |
| GMP Certified | ✓ | ✓ |
| Third-Party Tested | ✓ | ✓ |
| FDA Recalls | 0 | 0 |
| FDA Warning Letters | 0 | 0 |
| Adverse Events | 22 | 80 |
| Founded | 1995 | 1971 |
Kirkland Signature Certifications
Third-party testing means an independent laboratory has verified this product's contents, purity, and potency match what's on the label.
Nature Made 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
FDA Record
Kirkland Signature
Kirkland Signature has a SupplementChecker.co trust score of 80/100, which is a Grade A, indicating a low risk level. Kirkland Signature products are USP Verified, meaning they've undergone identity, strength, and purity testing. While the brand has some positive attributes, consumers should be aware of elevated FDA adverse event reports.
Full profile →Nature Made
Nature Made has a SupplementChecker trust score of 75/100, which is a grade of B+ and indicates a LOW risk level. Nature Made products are USP Verified, meaning they are tested for identity, strength, and purity. While Nature Made claims to conduct third-party testing, they do not publish lab results.
Full profile →How we compare: Both brands are scored using our transparent algorithm based on certifications, FDA records, and transparency signals. We don't accept payment to alter scores. Compare other brands →
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