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Vitamin D3

Vitamin D3 is essential for avoiding one of the most common nutrient deficiencies.
Sophie Medlin
Head of Nutritional Research
April 14, 2020
2 min read

Major Functions

Immunity - Bone health - One of the most common nutrient deficiencies

In every dose


(equal to 20 eggs, or 13 tablespoons of fortified margarine*)

(*Ain’t nobody got time for that)

Fighting Talk

Vitamin D could also be beneficial to sufferers of depression, with supplementation resulting in a moderate improvement in depression ratings in a clinical trial of nearly 1,000 participants.

What’s in it for my brain?

It’s thought that vitamin D3 (the biologically active form) reduces harmful amyloid plaques in the brain (high levels of amyloid plaque is associated with Alzheimer’s disease). 

Fringe benefits




Plays well with

Supports the absorption of calcium from food. Less available on a plant-based diet, so non-meat eaters may consider supplementation.

Clever stuff

Vitamin D comes in two forms; ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3). Vitamin D3 is the biologically active form and it’s the more powerful of the two, increasing blood levels of vitamin D twice as much as D2.


Here’s a handful of relevant scientific studies on vitamin D3.

  • Trang, H. M., Cole, D. E., Rubin, L. A., Pierratos, A., Siu, S., & Vieth, R. (1998). Evidence that vitamin D3 increases serum 25-hydroxyvitamin D more efficiently than does vitamin D2. The American journal of clinical nutrition, 68(4), 854-858.

  • Allan, G. M., Cranston, L., Lindblad, A., McCormack, J., Kolber, M. R., Garrison, S., & Korownyk, C. (2016). Vitamin D: a narrative review examining the evidence for ten beliefs. Journal of general internal medicine, 31(7), 780-791.

  • Vellekkatt, F., & Menon, V. (2019). Efficacy of vitamin D supplementation in major depression: A meta-analysis of randomized controlled trials. Journal of postgraduate medicine, 65(2), 74.

  • National Institutes of Health. (2014). Office of Dietary Supplements, Vitamin D Fact Sheet for Health Professionals.

  • Vaziri, F., Nasiri, S., Tavana, Z., Dabbaghmanesh, M. H., Sharif, F., & Jafari, P. (2016). A randomized controlled trial of vitamin D supplementation on perinatal depression: in Iranian pregnant mothers. BMC pregnancy and childbirth, 16(1), 1-12.

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This product is not designed to replace a varied and balanced diet. Do not exceed stated dose. If you are pregnant, breastfeeding or taking any medication, please consult your doctor before use. Do not use it if the sachet has been opened. Store in a cool, dry place. Keep out of reach of children.

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