D3 + K2 Ingredient References

Our formulations are created with carefully sourced, research-backed ingredients.

Aranow, C. (2011). Vitamin D and the Immune System. Journal of Investigative Medicine: The Official Publication of the American Federation for Clinical Research, 59(6), 881–886.

Beulens, J. W. J., Booth, S. L., Heuvel, E. G. H. M. van den, Stoecklin, E., Baka, A., & Vermeer, C. (2013). The role of menaquinones (vitamin K2) in human health. British Journal of Nutrition, 110(8), 1357–1368.

Cardwell, G., Bornman, J. F., James, A. P., & Black, L. J. (2018). A Review of Mushrooms as a Potential Source of Dietary Vitamin D. Nutrients, 10(10), 1498.

Fukushima-Sakuno, E. (2020). Bioactive small secondary metabolites from the mushrooms Lentinula edodes and Flammulina velutipes. The Journal of Antibiotics, 73(10), 687–696.

Holick, M. F., Binkley, N. C., Bischoff-Ferrari, H. A., Gordon, C. M., Hanley, D. A., Heaney, R. P., Murad, M. H., Weaver, C. M., & Endocrine Society. (2011). Evaluation, treatment, and prevention of vitamin D deficiency: an Endocrine Society clinical practice guideline. The Journal of Clinical Endocrinology and Metabolism, 96(7), 1911–1930.

Kidd, P. M. (2010). Vitamins D and K as pleiotropic nutrients: clinical importance to the skeletal and cardiovascular systems and preliminary evidence for synergy. Alternative Medicine Review: A Journal of Clinical Therapeutic, 15(3), 199–222.

van Ballegooijen, A. J., Pilz, S., Tomaschitz, A., Grübler, M. R., & Verheyen, N. (2017). The Synergistic Interplay between Vitamins D and K for Bone and Cardiovascular Health: A Narrative Review. International Journal of Endocrinology, 2017, 7454376.

Vieth, R. (2004). Why the optimal requirement for Vitamin D3 is probably much higher than what is officially recommended for adults. The Journal of Steroid Biochemistry and Molecular Biology, 89–90(1–5), 575–579.

Zhang, J.-J., Li, Y., Zhou, T., Xu, D.-P., Zhang, P., Li, S., & Li, H.-B. (2016). Bioactivities and Health Benefits of Mushrooms Mainly from China. Molecules, 21(7), 938.

National Institutes of Health Office of Dietary Supplements. Vitamin D fact sheet for health professionals. Updated August 17, 2021.

National Institutes of Health Office of Dietary Supplements. Vitamin K fact sheet for health professionals. Updated March 29, 2021.