Segmental Analysis of Human Hair Reveals Intra-Annual Variation in 25(OH)D3 Concentrations in Modern and Archaeological Individuals

January 2025 in “ Scientific Reports ”

Kate Britton, Orsolya Czére, Eléa Gutierrez, Linda M. Reynard, Éamon Laird, Gary Duncan, Baukje de Roos

25(OH)D3 vitamin D hair analysis supplementation weight loss

TLDR Hair analysis can show changes in vitamin D levels over time.

The study examined 25(OH)D3 concentrations in human hair from 16 participants, including one archaeological individual, to assess vitamin D status. It found detectable levels in 14 participants, with significant intra-hair variability and higher concentrations in some linked to supplementation and weight loss. No significant trends were observed related to age, sex, BMI, supplement intake, outdoor time, or fish consumption. The research suggests hair analysis could provide time-series insights into vitamin D status, though further studies are needed due to the small sample size. The study also explored the potential of using hair analysis to assess historical vitamin D status, despite challenges like different extraction protocols and lack of ethnic diversity.

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Research cited in this study

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research Vitamin D Status Assessment: Lack of Correlation Between Serum and Hair 25-Hydroxycholecalciferol Levels in Healthy Young Adults

2 citations, May 2022 in “Diagnostics”

Vitamin D levels in hair don't match those in blood, so hair isn't a reliable indicator of Vitamin D status.

research A Non-Invasive Hair Test to Determine Vitamin D3 Levels

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The hair test for vitamin D could be a useful alternative to blood tests, providing a longer-term vitamin D status, but more research is needed.

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Compressed part of research of theory of androgenic/anabolitic balance. AGA h-responders analytic. Theory of physio-metabolitic method of anti AGA treatment

community Compressed part of research of theory of androgenic/anabolitic balance. AGA h-responders analytic. Theory of physio-metabolitic method of anti AGA treatment

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community If you're sitting there wondering, "I'm losing my hair, what do I do?" then read my advice here. I've been fighting the fight for 7 years, with great success. (pictures included)

in Question 109 upvotes 11 years ago

Fighting hair loss with "The Big 3" treatments of Propecia, Rogaine and Nizoral shampoo, as well as specific advice on how to use these products. People have shared their long-term success stories and some have discussed the side effects of finasteride. Other suggestions included Lipogaine and Pura D'or Hair Loss Prevention Therapy Shampoo & Conditioner.

community Going to try and reverse MPB naturally.

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community PSA: Get your Vitamin D levels checked!

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community 25 months. Dutasteride, RU58841, Minoxidil, Microneedling, Nizoral, T/GEL, fixing vitamin D levels

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