Certified vitamin D products compared

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Bottom line

These are not ranked by how well they raise a blood level. 15 brands had a vitamin D product on a public list on 15 October 2026. The adult upper limit is 4,000 IU a day, so a 5,000 IU softgel is above that limit unless a clinician is treating a deficiency. Jamieson's listed vitamin D licence is a 400 IU children's chewable. An NPN is a licence to sell in Canada, not a purity seal. We do not use affiliate links.

Dose first, seal second. The allowance and the winter context are in vitamin D in a Canadian winter. Vitamin D3 is the form on most of these labels. This table only includes names we saw on a certifier or licence page.

What the programs mean

USP Verified is a specific formula on the USP list. NSF Certified for Sport and Informed-Sport are aimed at drug-tested athletes. Informed-Choice is a separate consumer list. A Health Canada NPN is permission to sell that natural health product. Nature Made, Kirkland Signature, and Member's Mark vitamin D softgels in the table are USP examples where the directory named them. Nordic Naturals sport vitamin D gummies are NSF examples. They are not automatically better than a USP 1,000 IU softgel for an adult who only needs the dietary allowance.

BrandExample on the listProgramRest of the list
JamiesonJamieson Kids Chewable Vitamin D3 400 IUHealth Canada NPNOnly this match on the brand page
USANAUSANA Vitamin DInformed ChoiceOnly this match on the brand page
6d Sports Nutrition6d VITAMIN D3Informed Sport1 other named product on the brand page
Blue Star NutraceuticalsBlue Star Nutraceuticals Vitamin D3Informed Sport1 other named product on the brand page
KineticaKinetica Vitamin DInformed SportOnly this match on the brand page
Science in SportSiS Vitamin D3 TabletsInformed SportOnly this match on the brand page
AG1USA AG Vitamin D3+K2 Oral DropsNSF Certified for Sport1 other named product on the brand page
Bulk SupplementsVITAMIN D3 5000 IIU SOFTGELSNSF Certified for SportOnly this match on the brand page
Designs for SportVitamin D + KNSF Certified for Sport1 other named product on the brand page
MomentousVitamin DNSF Certified for Sport1 other named product on the brand page
Nordic NaturalsVitamin D3 Gummies SportNSF Certified for Sport2 other named products on the brand page
Kirkland SignatureKirkland Signature Calcium 600 mg with Vitamin D3 TabletsUSP VerifiedOnly this match on the brand page
Member's MarkMember's Mark Vitamin D3 50 mcg (2000 IU) SoftgelsUSP Verified1 other named product on the brand page
Nature MadeNature Made Vitamin D3 2000 IU (50 Mcg) TabletsUSP Verified11 other named products on the brand page
Nature's BountyNature's Bounty Vitamin D3 125 mcg SoftgelsUSP VerifiedOnly this match on the brand page

Full product names, including flavors, are on each brand page. K2 is not required: do you need vitamin K2 with vitamin D?

Sources

  1. USP Verified product directory. USP.
  2. Health Canada Licensed Natural Health Products Database. LNHPD.
  3. NIH Office of Dietary Supplements. Vitamin D fact sheet for health professionals. NIH ODS.