

133: The Truth About Vitamin D That No One’s Telling You PART 2
Jul 8, 2025
Dive deep into the complexities of vitamin D levels and the risks of high-dose supplementation. Discover why traditional reference ranges can mislead and how megadosing may worsen health issues. Learn about the interconnectedness of vitamin D with other health factors, emphasizing a root-cause approach over quick fixes. Tara also shares insights on how sunlight and diet play crucial roles in maintaining vitamin D, making it clear that asking the right questions about your health is essential.
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Vitamin D Reference Range Confusion
- Vitamin D reference ranges vary wildly, causing confusion and overdiagnosis of deficiency.
- Many healthy people have levels between 15 and 30 ng/mL, which may be adequate despite higher thresholds advised by some experts.
Vitamin D Threshold Nutrient
- Both low and high vitamin D levels are linked to increased mortality risk.
- More vitamin D is not better; benefits cap at a certain threshold and excessive levels can be harmful.
Limited Benefits of Vitamin D Supplements
- Large studies show vitamin D supplementation does not reduce risk of cancer, heart disease, or overall mortality.
- Vitamin D may reduce cancer mortality once diagnosed but does not prevent cancer onset.