Vitamin D

Found InFish, milk, and fortified dairy products
SupplierThe GHT Companies / ESB Developments Ltd
Final Location of ManufacturingNottingham, UK
Get to Know Our Supplier
Vitamin D3


Bone Health*

Immune Support*

Ritual uses Vitashine™, a Certified Vegan D3 ingredient made from sustainably-sourced lichen.

Vitamin D3 assists with calcium absorption.*


Vitamin D3

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 some relevant MVPs.


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

Nutrition Impact LLC


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

University of Toronto


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

University of Ottawa


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

University of Northern British Columbia


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

University of California at Los Angeles


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

Wageningen University


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

University of Helsinki

There are 50,918 studies on Vitamin D and counting

Substantiation is a living, breathing thing. We are constantly reviewing new research.

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