You take your blood pressure pill, eat your salad, walk every morning… yet you still feel like you’re dragging a 50-pound backpack through life. Your last vitamin D test came back “28 ng/mL” — doctor shrugged and said “low-normal, nothing to worry about.”
Here’s what almost no one tells you: For people over 50 (especially with kidneys, heart, or blood-sugar issues), anything under 50–60 ng/mL is silently wrecking your body in eight bizarre ways that never show up as “classic” vitamin D symptoms.
