zinc
18 certified brands.
Ranked by number of independent third-party certifications (Labdoor letter grade breaks ties). This reflects how thoroughly each brand is independently verified — not product quality, efficacy, or price, and not an endorsement.
| Rank | Brand | Certifications | Indep. bodies | Products | Shop |
|---|---|---|---|---|---|
| #1 Most independently tested | Core Med Science | NSF_DIETARY NSF_SPORT | 2 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Designs for Health | NSF_DIETARY NSF_SPORT | 2 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Momentous | NSF_DIETARY NSF_SPORT | 2 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Nestlé Health Science | NSF_DIETARY NSF_SPORT | 2 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Thorne | NSF_DIETARY NSF_SPORT | 2 | 5 | Shop:AmazoniHerb |
| #6 | Access Business Group, LLC | NSF_DIETARY | 1 | 3 | Shop:AmazoniHerb |
| #6 | Amway Taiwan Company Limited | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #6 | Codeage | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #6 | Farmacias de Similares TX LLC | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #6 | Healthspan Elite | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #6 | International Vitamin Corporation | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #6 | Irwin Naturals | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #6 | Kinetica | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #6 | Natural Health Partners, LLC | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #6 | New Capstone, Inc. | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #6 | Orthosapri Pro | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #6 | Sympleaf | NSF_SPORT | 1 | 1 | Shop:AmazoniHerb |
| #6 | Target Corporation | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
Best zinc for: Immune Support