Supplement Cert Directory

vitamin c

28 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.

RankBrandCertificationsIndep. bodiesProductsShop
#1 Most independently tested Aurora Nutrascience NSF_DIETARY NSF_SPORT 25Shop:AmazoniHerb
#1 Most independently tested Core Med Science NSF_DIETARY NSF_SPORT 22Shop:AmazoniHerb
#1 Most independently tested Nordic Naturals NSF_DIETARY NSF_SPORT 22Shop:AmazoniHerb
#41st Step ProWellness INFORMED 11Shop:AmazoniHerb
#4Access Business Group, LLC NSF_DIETARY 12Shop:AmazoniHerb
#4Amazon.com Services, LLC NSF_DIETARY 11Shop:AmazoniHerb
#4BJ’s Wholesale Club, Inc. NSF_DIETARY 11Shop:AmazoniHerb
#4Boston Nutraceutical Science NSF_DIETARY 14Shop:AmazoniHerb
#4Bubs Naturals NSF_DIETARY 11Shop:AmazoniHerb
#4Codeage NSF_DIETARY 12Shop:AmazoniHerb
#4Crown Sport Nutrition INFORMED 11Shop:AmazoniHerb
#4Etixx INFORMED 13Shop:AmazoniHerb
#4Farmacias de Similares TX LLC NSF_DIETARY 12Shop:AmazoniHerb
#4H-E-B, LP. NSF_DIETARY 11Shop:AmazoniHerb
#4HMS Nutrition LLC NSF_DIETARY 11Shop:AmazoniHerb
#4Healthspan Elite INFORMED 12Shop:AmazoniHerb
#4Hormel Foods Sales, LLC NSF_DIETARY 13Shop:AmazoniHerb
#4International Vitamin Corporation NSF_DIETARY 111Shop:AmazoniHerb
#4Lypo-C for SPORTS INFORMED 12Shop:AmazoniHerb
#4Magceutics LLC NSF_DIETARY 11Shop:AmazoniHerb
#4Natural Health Partners, LLC NSF_DIETARY 11Shop:AmazoniHerb
#4Nature Made USP 11Shop:AmazoniHerb
#4Nature's Truth NSF_DIETARY 12Shop:AmazoniHerb
#4New Capstone, Inc. NSF_DIETARY 11Shop:AmazoniHerb
#4Nutrition X INFORMED 11Shop:AmazoniHerb
#4Target Corporation NSF_DIETARY 13Shop:AmazoniHerb
#4Thorne NSF_DIETARY 16Shop:AmazoniHerb
#4Yutrition INFORMED 11Shop:AmazoniHerb