11/09/2025
Excellent summary about vitamin D. It's essential to maintain optimal vitamin D levels, yet most people are quite deficient. Also, standard lab reference ranges are too low. So if your conventional provider is telling you your level of 30 is normal...It's not! Learn more below.
The Power of Vitamin D
Vitamin D is vital for good health. Every tissue in the body needs vitamin D, yet a large percentage of the world's population is deficient. Even a mild deficiency can contribute to chronic and autoimmune diseases such diabetes, cardiovascular disease, depression, cancer (including ovarian, colon, and breast), multiple sclerosis, and psoriasis.
Nature intended for us to get vitamin D from exposure to sunlight, but colder temperatures prevents bare-skin sun exposure. Additionally, we don't eat enough D-rich foods, like egg yolk, cod liver oil, shiitake mushrooms, and wild salmon. Fortified milk/dairy is also not the best source because you'd need several cups every day.
The best way to help the body establish optimal levels of vitamin D is to take a supplement.
The recommended blood level of vitamin D (above 25 nmol/L) was established to protect people from bone disease (rickets and osteomalacia). From the natural medicine perspective (and emerging scientific data), that threshold is too low to protect against serious illness or to promote optimal health. Depending on the individual, holistic physicians identify 45-90 nmol/L as the ideal vitamin D blood level for disease prevention.
Age, gender, diet, stress level, and lifestyle factors affect absorption of vitamin D. A holistic physician can order a blood test prior to starting a supplement to help ensure you take the appropriate amount and form of vitamin D.
Resources:
The VitaminD Society. Accessed 5 June 2018: http://www.vitamindsociety.org/videos.php?sub=Misc%20Vitamin%20D%20Videos
Holick, M.F., "Sunlight and vitamin D for bone health and prevention of autoimmune diseases, cancers, and cardiovascular disease." The American Journal of Clinical Nutrition, (1 December 2004) 80: 6,–1688S. Accessed 5 June 2018: https://doi.org/10.1093/ajcn/80.6.1678S
Grassroots Health. "VitaminD*Action" brochure. Digital copy available:http://www.vitamindsociety.org/pdf/New%20D%20Action%20Call%20to%20action%20and%20FAQ%20sheet%20Jan%2011.pdf
NIH.gov "Vitamin D Fact Sheet for Health Professionals." Accessed 5 June 2018: https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/