New Vitamin D Study on Telomeres and Aging

Brad Stanfield

Oct 11, 2025

Episode description

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Timestamps:
00:00 New Vitamin D and Telomere Study
02:24 Questioning the Accuracy of the qPCR Method
03:39 Understanding the Biological Significance of Telomere Length
05:16 Limitations of the Study
06:21 Key Takeaways from the Study
07:00 The Controversy Surrounding Vitamin D Supplements
09:04 The Revised Endocrine Society Vitamin D Guidelines
09:46 Dr Brad's Personal Vitamin D Intake

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Here are the links to the research papers referenced in the video:
https://www.sciencedirect.com/science/article/abs/pii/S0002916525002552
https://www.nature.com/articles/s41556-022-00842-x
https://pmc.ncbi.nlm.nih.gov/articles/PMC4112289
https://academic.oup.com/ije/article/44/5/1673/2594545
https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2020.630186/full
https://pmc.ncbi.nlm.nih.gov/articles/PMC11896355
https://pmc.ncbi.nlm.nih.gov/articles/PMC7089819/
https://academic.oup.com/jcem/article/109/8/1961/7686350
https://pubmed.ncbi.nlm.nih.gov/16529140/
https://academic.oup.com/jcem/article/96/7/1911/2833671
https://pubmed.ncbi.nlm.nih.gov/31454046/
https://academic.oup.com/jcem/article/109/8/1907/7685305

Thumbnail by James Kelly
Video edited by Troy Young
Script by John Milliken

The links above are affiliate links, so I receive a small commission every time you use them to purchase a product. The content contained in this video, and its accompanying description, is not intended to replace viewers’ relationships with their own medical practitioner. Always speak with your doctor regarding the content of this channel, and especially before using any products, services, or devices discussed on this channel.

Episode description

Mindsip insights from this episode:

Prioritize sun exposure over supplements for safe vitamin D levels

The body can regulate vitamin D production from sun exposure, but it cannot control intake from supplements, making high doses potentially harmful.

#sunlight

#vitamin-D

Prioritize proven metrics for long-term health

Traditional metrics like BMI, LDL cholesterol, and blood pressure are what truly move the needle for long-term health, not exciting but unproven markers like telomere length.

#blood-pressure

#BMI

Question validity of vitamin D study findings on telomere length

The observed 140 base pair difference in telomere length from vitamin D supplementation is within the range of measurement error for the QPCR method used in the study.

#study

#vitamin-D

Reevaluate vitamin D's impact on heart health and mortality

Despite modest telomere changes, the main VITAL study found no significant reductions in heart attacks, strokes, or all-cause mortality for the vitamin D group.

#mortality

#vitamin-D

Avoid high doses of vitamin D to protect bone health

A clinical trial found that high doses of vitamin D, specifically 4,000 and 10,000 IU, actually decreased bone mineral density rather than improving it.

#bones

#vitamin-D

Avoid routine vitamin D tests for general population

The latest Endocrine Society guidelines no longer recommend routine vitamin D blood tests for the general population because the optimal blood level is unknown.