Ranked by evidence

Best Vitamin D Supplements

The 7 highest-scoring vitamin d supplements in Formulate's catalog, ranked by the same automated rubric we apply to every product: ingredient dose, bioavailable form, label transparency, safety, and third-party testing. No sponsorships, no pay-to-play.

Scored by the Formulate Research Team · Last reviewed May 2026

1
Momentous
Vegan Vitamin D3 5000 IU Supplement
Maintaining skeletal integrity: Vitamin D3 plays a critical role in maintaining healthy bones by aiding the body’s calcium & phosphorus absorption. Without adequate vitamin D3,…
98A
2
Thorne
Vitamin D Liquid
Good health starts with vitamin D, which supports healthy bones and muscles, cardiovascular health, and immune function* Vitamin D3 in liquid form to provide easy, accurate, and…
98A
3
Thorne
Vitamin D-10,000
Take your health into your hands with evidence-based recommendations for your specific wellness goals. ✓ Check out our lab draw and at-home health tests!
98A
4
Transparent Labs
Vitamin D3 K2
Support immune, bone & heart health with 5,000 IU VEGAD3LIGHT® Vitamin D3 & 100mcg MK-7 Vitamin K2 for optimal calcium absorption & overall wellness.
98A
5
Thorne
Vitamin D + K2 Liquid
A convenient combination of vitamin D and vitamin K for bone, cardiovascular, and immune support* Vitamin D + K2 Liquid promotes bone health, healthy immune function, and cardio…
98A
6
Thorne
Vitamin D-5,000
Take your health into your hands with evidence-based recommendations for your specific wellness goals. ✓ Check out our lab draw and at-home health tests!
96A
7
Thorne
Vitamin D-1,000
Take your health into your hands with evidence-based recommendations for your specific wellness goals. ✓ Check out our lab draw and at-home health tests!
95A

Frequently asked questions

What is the best vitamin d supplement?

Momentous Vegan Vitamin D3 5000 IU Supplement is Formulate's highest-scoring vitamin d supplement at 98/100 (grade A). Maintaining skeletal integrity: Vitamin D3 plays a critical role in maintaining healthy bones by aiding the body’s calcium & phosphorus absorption. Without adequate vitamin D3,…

How does Formulate rank vitamin d supplements?

Each product is scored 0–100 by an automated rubric covering evidence quality, dose accuracy, bioavailable form, label transparency, safety, and manufacturing. Rankings reflect the formula on the label — not advertising or sponsorships.

How many vitamin d supplements were compared?

This ranking shows the top 7 vitamin d products Formulate has scored. Browse the full catalog for every product and its breakdown.

Best supplements by category

Best Adaptogens Best Minerals Best Amino Acids Best Nootropics Best B Vitamins Best Antioxidants Best Fish Oil & Omegas Best Anti-Inflammatory

How these are ranked

Every vitamin d product is scored on dose accuracy, ingredient form, certifications, transparency, and third-party testing — the same rubric across the whole catalog. See the methodology page for the full breakdown, or browse every supplement.

Educational only. Rankings reflect product formulation quality, not personalized medical advice. Talk to a qualified healthcare provider before starting a new supplement, especially if you take medication.