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Glossary Vitamin D

fat-soluble vitamin essential for calcium absorption and bone health

Vitamin D is a fat-soluble vitamin that is crucial for maintaining healthy bones and teeth by aiding in the absorption of calcium and phosphorus from the gut. It can be obtained through exposure to sunlight, certain foods, and supplements. There are two main forms: vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol), with D3 being more effective at raising blood levels of the vitamin. Deficiency in vitamin D can lead to conditions such as rickets in children and osteomalacia in adults.

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vitamin you should probably be taking for general health might also help your hair a little

What is the connection between Vitamin D and hair loss? Vitamin D deficiency may contribute to hair loss by disrupting hair follicle regulation.
Can Vitamin D deficiency trigger excessive hair shedding? Yes, vitamin D deficiency can trigger excessive hair shedding.
Is it safe to take Vitamin D supplements for hair growth? Vitamin D supplements are generally safe but may not significantly improve hair growth.
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Research

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research Mutations in the vitamin D receptor gene in four patients with hereditary 1,25-dihydroxyvitamin D-resistant rickets

24 citations , November 2008 in “Arquivos Brasileiros de Endocrinologia & Metabologia”

In this study, mutations in the vitamin D receptor were identified in Brazilian children with rickets and alopecia, leading to impaired receptor activation and reduced 24-hydroxylase expression.

research Serum vitamin D3 level in patients with female pattern hair loss

23 citations , January 2016 in “International Journal of Trichology”

This study found that women with female pattern hair loss had significantly lower serum Vitamin D3 levels compared to healthy controls.

Vitamin D And The Skin: A Review For Dermatologists

research Vitamina D y la piel. Una revisión para dermatólogos

16 citations , March 2019 in “Actas Dermo-Sifiliográficas”

This review discusses the relationship between vitamin D and various skin diseases but reports no new clinical results, emphasizing the need to assess and correct vitamin D deficiencies.

research Vitamin D and the Skin: A Review for Dermatologists

13 citations , April 2019 in “Actas Dermo-Sifiliográficas”

This review discusses the relationship between vitamin D and various skin diseases, highlighting recent findings on its role and the importance of assessing and correcting vitamin D levels, but reports no new clinical results.

research ¿Son eficaces los suplementos y las vitaminas en el tratamiento de la alopecia androgenética?

July 2025 in “Nutrición clínica y dietética hospitalaria/Nutrición clínica, dietética hospitalaria”

This study reviewed various supplements for treating androgenetic alopecia and found that Serenoa repens shows the strongest evidence for use as a single treatment, while ketoconazole may help as an adjunct. Other supplements like zinc, vitamin D, and biotina are not recommended unless deficiencies exist.

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community Check your vitamin d3 levels!!!

158 upvotes 2 months ago

Vitamin D3 deficiency and gut health, particularly H. pylori overgrowth, can impact hair growth and overall health. Treatments like Minoxidil and finasteride may be ineffective if these issues are not addressed.

community Vitamin D deficiency and hair loss - does anyone have personal evidence of hair regrowth following correction?

in Research/Science 4 upvotes 3 months ago

Vitamin D deficiency may contribute to hair loss, but correcting it alone doesn't guarantee regrowth. Users report mixed results with supplements and treatments like minoxidil, finasteride, and dutasteride.

community Rare case: AGA recovery with vitamin D alone (case study)

51 upvotes 5 months ago

Vitamin D deficiency can hinder hair recovery, and addressing it may help with hair loss. Hair loss may result from various issues like excess DHT, vitamin deficiency, or scalp inflammation.

community Vitamin D slight temple regrowth

111 upvotes 6 months ago

Vitamin D supplementation may have led to slight hair regrowth and density improvement. Other treatments discussed include finasteride, minoxidil, and maintaining optimal vitamin D levels.

community Vitamin Deficiency Correction Timeline?

in Female 2 upvotes 7 months ago

A user is experiencing hair regrowth after treating vitamin D, B12, and B9 deficiencies, noticing some improvement after 9 months. They are unsure if further improvement will occur or if they have reached the end of progress, with a possibility of androgenetic alopecia (AGA) being suggested.

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