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Vitamin D3

2000 IU

  • Healthy Bones*
  • Immune Support*
  • Cognition*

Why Our Form

Ritual uses Vitashine™, the world’s only Certified Vegan D3 ingredient made from globally-sourced lichen, unlike the commonly used sheep's wool or fish liver oil.

Vitamins work together

Vitamin D3
Vitamin D3 assists with calcium absorption.

Found in

Fish, milk and fortified dairy products.

Evidence-Based or Bust

We use nutrients backed by a significant body of research that is growing every day. Of the thousands of unaffiliated studies our in-house scientists sorted through to guide our choices, the titles below are the most relevant MVPs.

Foods, fortificants, and supplements: where do Americans get their nutrients? - 2011

Randomized comparison of the effects of the vitamin D3 adequate intake versus 100 mcg (4000 IU) per day on biochemical responses and the wellbeing of patients - 2004

Effectiveness and safety of vitamin D in relation to bone health - 2007

Does high dose vitamin D supplementation enhance cognition?: A randomized trial in healthy adults - 2017

Unexpected actions of vitamin D: new perspectives on the regulation of innate and adaptive immunity - 2008

The impact of 1-year vitamin D supplementation on vitamin D status in athletes: a dose–response study - 2016

Effects of vitamin D2-fortified bread v. supplementation with vitamin D2 or D3 on serum 25-hydroxyvitamin D metabolites: an 8-week randomised-controlled trial in young adult Finnish women - 2016

There are 50,918 studies on Vitamin D and counting

Substantiation is a living, breathing thing. We are constantly reviewing new research. Have a study you think we should take a look at? Send it our way:

Only what you need,
Nothing you don’t