In this Vitamin D Study Hour, GrassrootsHealth welcomes Dr. Richard Cheng, MD, PhD, for an in-depth discussion on vitamin D resistance—a growing and often misunderstood issue where individuals show adequate or even high vitamin D blood levels but continue to experience signs of deficiency.
Dr. Cheng explores why vitamin D does not work the same way for everyone and explains how genetics, inflammation, obesity, gut health, micronutrient interactions, and lifestyle factors all influence vitamin D effectiveness at the cellular level – and health overall.
