Why Vitamin D Deficiency Is So Common — And Why Supplements Don’t Always Work

Vitamin D deficiency is not always caused by low sun exposure. Absorption, activation, magnesium status, inflammation, and receptor signaling determine whether vitamin D can function properly—even when blood levels appear normal.

Functional medicine, NutritionMartina SturmApril 10, 2022Denver Sports and Holistic Medicinevitamin D deficiency, low vitamin D levels, vitamin D supplements not working, vitamin D absorption problems, vitamin D blood test interpretation, magnesium and vitamin D activation, vitamin D receptor function, fat soluble vitamin absorption, vitamin D cofactors, vitamin K2 calcium balance