Best vitamin d for Immune Support
Third-party-tested supplement types commonly associated with immune support routines.
52 third-party-certified brands listed below — certification status is factual; this is not medical or efficacy advice.
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 | AG1 | NSF_DIETARY NSF_SPORT | 2 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Aurora Nutrascience | NSF_DIETARY NSF_SPORT | 2 | 3 | Shop:AmazoniHerb |
| #1 Most independently tested | Core Med Science | NSF_DIETARY NSF_SPORT | 2 | 5 | Shop:AmazoniHerb |
| #1 Most independently tested | Designs for Health | NSF_DIETARY NSF_SPORT | 2 | 2 | Shop:AmazoniHerb |
| #1 Most independently tested | LTF Club Operations Company, Inc. | NSF_DIETARY NSF_SPORT | 2 | 2 | Shop:AmazoniHerb |
| #1 Most independently tested | Momentous | NSF_DIETARY NSF_SPORT | 2 | 2 | Shop:AmazoniHerb |
| #1 Most independently tested | Natura Health Products | NSF_DIETARY NSF_SPORT | 2 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | Nordic Naturals | NSF_DIETARY NSF_SPORT | 2 | 2 | Shop:AmazoniHerb |
| #1 Most independently tested | Vinatura | NSF_DIETARY NSF_SPORT | 2 | 1 | Shop:AmazoniHerb |
| #1 Most independently tested | dotFIT | NSF_DIETARY NSF_SPORT | 2 | 1 | Shop:AmazoniHerb |
| #11 | 1st Step ProWellness | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | 6d Sports Nutrition | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Access Business Group, LLC | NSF_DIETARY | 1 | 2 | Shop:AmazoniHerb |
| #11 | Amazon.com Services, LLC | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | BJ’s Wholesale Club, Inc. | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Boston Nutraceutical Science | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Captek Softgel International, Inc. | NSF_DIETARY | 1 | 3 | Shop:AmazoniHerb |
| #11 | Centenarian Road | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Codeage | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Ddrops Company | NSF_DIETARY | 1 | 12 | Shop:AmazoniHerb |
| #11 | Farmacias de Similares TX LLC | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Flynew Global Inc | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Genexa Inc. | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | H-E-B, LP. | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Healthspan Elite | INFORMED | 1 | 4 | Shop:AmazoniHerb |
| #11 | Heartwise Incorporated | NSF_DIETARY | 1 | 6 | Shop:AmazoniHerb |
| #11 | International Vitamin Corporation | NSF_DIETARY | 1 | 11 | Shop:AmazoniHerb |
| #11 | Kinetica | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | MOM Enterprises, Inc. | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Magceutics LLC | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | MaxiNutrition | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Minami | INFORMED | 1 | 2 | Shop:AmazoniHerb |
| #11 | NORSAN | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Natural Health Partners, LLC | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Nature Made | USP | 1 | 3 | Shop:AmazoniHerb |
| #11 | Nutriburst | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Nutrition X | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Puresport | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Raw Sport | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | SCN Bestco | NSF_DIETARY | 1 | 3 | Shop:AmazoniHerb |
| #11 | Science In Sport | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Smarter Nutrition Inc. | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Soccer Supplement | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | SunVit Pro | INFORMED | 1 | 1 | Shop:AmazoniHerb |
| #11 | Target Corporation | NSF_DIETARY | 1 | 4 | Shop:AmazoniHerb |
| #11 | The Pause Life Supplements, LLC | NSF_DIETARY | 1 | 1 | Shop:AmazoniHerb |
| #11 | Theralogix, LLC | NSF_DIETARY | 1 | 5 | Shop:AmazoniHerb |
| #11 | Thorne | NSF_DIETARY | 1 | 6 | Shop:AmazoniHerb |
| #11 | Vital Choice Seafood LLC | NSF_DIETARY | 1 | 3 | Shop:AmazoniHerb |
| #11 | Wegmans | NSF_DIETARY | 1 | 2 | Shop:AmazoniHerb |
| #11 | Wholesome Story, LLC | NSF_DIETARY | 1 | 3 | Shop:AmazoniHerb |
| #11 | fourfive cbd | BSCG | 1 | 3 | Shop:AmazoniHerb |
See all certified vitamin d brands .