vitamin b12
8 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 | Farmacias de Similares TX LLC | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Healthspan Elite | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Heartwise Incorporated | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | International Vitamin Corporation | NSF_DIETARY | 1 | 7 | Shop:AmazoniHerb |
| #1 Most independently tested | Nature Made | USP | 1 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | SCN Bestco | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Thorne | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Wegmans | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |