Description
Vitamin D deficiency is one of the most widespread yet underdiagnosed nutritional problems in the modern world, affecting an estimated one billion people globally. The challenge is that its symptoms are often vague, overlap with other conditions, and are frequently dismissed as normal aging or stress. In this essential video, Dr. Berg walks through the most telling signs that your body is desperately low in vitamin D—ranging from persistent fatigue, frequent illness, and depression to bone pain, hair loss, muscle weakness, and slow wound healing. He explains why vitamin D functions more like a hormone than a vitamin, influencing over 200 genes and regulating immune function, mood, calcium metabolism, and inflammation throughout the body. Dr. Berg also reveals the most common reasons people remain deficient despite supplementing—including poor supplement form, lack of cofactors like magnesium and vitamin K2, gut absorption issues, and inadequate sun exposure. You’ll learn how to test your vitamin D levels accurately, what optimal—not just normal—ranges look like, and how to correct a deficiency safely and effectively. If you’ve been feeling off and can’t figure out why, vitamin D may be the missing piece.
