zinc
19 certified brands.
Grouped into tiers by the number of independent third-party certifications each brand holds (more bodies = higher tier). Within a tier, brands are ordered by how many of their products are certified, then by how recently each was verified, then Labdoor letter grade breaks remaining ties. This reflects only how thoroughly each brand is independently verified — not product quality, efficacy, or price, and not an endorsement.
Verified by 2 independent bodies
Most independently tested| Brand | Certifications | Products | Verified | Shop |
|---|---|---|---|---|
| Thorne | NSF_DIETARY NSF_SPORT | 5 | — | Shop:AmazoniHerbFullscript |
| Core Med Science | NSF_DIETARY NSF_SPORT | 1 | — | Shop:AmazoniHerbFullscript |
| Designs for Health | NSF_DIETARY NSF_SPORT | 1 | — | Shop:AmazoniHerbFullscript |
| Momentous | NSF_DIETARY NSF_SPORT | 1 | — | Shop:AmazoniHerbFullscript |
| Nestlé Health Science | NSF_DIETARY NSF_SPORT | 1 | — | Shop:AmazoniHerbFullscript |
Verified by 1 independent body
| Brand | Certifications | Products | Verified | Shop |
|---|---|---|---|---|
| Access Business Group, LLC | NSF_DIETARY | 3 | — | Shop:AmazoniHerbFullscript |
| Amacx | INFORMED | 1 | — | Shop:AmazoniHerbFullscript |
| Amway Taiwan Company Limited | NSF_DIETARY | 1 | — | Shop:AmazoniHerbFullscript |
| Codeage | NSF_DIETARY | 1 | — | Shop:AmazoniHerbFullscript |
| Farmacias de Similares TX LLC | NSF_DIETARY | 1 | — | Shop:AmazoniHerbFullscript |
| Healthspan Elite | INFORMED | 1 | — | Shop:AmazoniHerbFullscript |
| International Vitamin Corporation | NSF_DIETARY | 1 | — | Shop:AmazoniHerbFullscript |
| Irwin Naturals | NSF_DIETARY | 1 | — | Shop:AmazoniHerbFullscript |
| Kinetica | INFORMED | 1 | — | Shop:AmazoniHerbFullscript |
| Natural Health Partners, LLC | NSF_DIETARY | 1 | — | Shop:AmazoniHerbFullscript |
| New Capstone, Inc. | NSF_DIETARY | 1 | — | Shop:AmazoniHerbFullscript |
| Orthosapri Pro | INFORMED | 1 | — | Shop:AmazoniHerbFullscript |
| Sympleaf | NSF_SPORT | 1 | — | Shop:AmazoniHerbFullscript |
| Target Corporation | NSF_DIETARY | 1 | — | Shop:AmazoniHerbFullscript |
Best zinc for: Immune Support