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Glossary Hair Medulla

innermost layer of a hair strand, often containing air spaces

The hair medulla is the innermost layer of a hair strand, often composed of soft, spongy cells that may contain air spaces. While its exact function is not fully understood, it is thought to contribute to the hair's overall strength and may play a role in the hair's ability to insulate. Not all hair types have a medulla, and its presence can vary between individuals and even among different hairs on the same person.

Related Terms

Research

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research [Contribution to hair medulla study (author's transl)].

4 citations , January 1981 in “PubMed”

This study found that medullary cell content in mammal hair evolves from an amorphous form to a biphasic phase, with human and anthropoid hair containing both macrofibrils and microfibrils.

research Characterization of Hair Follicles in Hirosaki Hairless Rats with Deletion of Basic Hair Keratin Genes. Enlarged Medulla, Loss of Cuticle and Long Catagen

3 citations , March 2009 in “Hirosaki University Repository for Academic Resources (Hirosaki University)”

This study in hairless rats suggests that the deletion of specific hair keratin genes contributes to hypotrichosis and highlights the strain's potential as a model for hair follicle research.

research A New Approach to Obtain Attractive Hair: Hair Medulla Care

2 citations , March 2023 in “Journal of Society of Cosmetic Chemists of Japan”

This study found that the "Hair Medulla Care" treatment allows various substances to penetrate hair more effectively, suggesting potential applications for enhancing hair coloring, care, and perming processes.

research Hair Medulla and its variations in Doshaja Prakruti – An observational study

September 2025 in “International Journal of Ayurvedic Medicine”

This study observed distinct variations in hair medulla patterns among people with different Ayurvedic Prakruti types, linking stronger hair integrity to Kapha-dominant types and weaker, fragmented medullae to Vata and Pitta-dominant types, potentially aiding in Dosha-specific hair care and assessment.

research Faculty Opinions recommendation of The keratins of the human beard hair medulla: the riddle in the middle.

March 2010 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature”

This study found that both epithelial and hair keratins are expressed in beard hair medulla cells, exhibiting unique patterns and interactions distinct from other hair follicle and epithelial cells.

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Clinics

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Community Join

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community A practical checklist for comparing hair transplant clinics before deciding

in Hair Transplants 107 upvotes 5 days ago

When comparing hair transplant clinics, consider factors beyond price and graft count, such as surgeon involvement, donor area assessment, technique, aftercare, and what's included in the price. Use a checklist to evaluate clinics and avoid pressure tactics or vague information.

community Positive experience with Dr. K C Dharam Kumar — Laser hair reduction

in Hair Transplants 9 upvotes 5 days ago

The user had a positive experience with Dr. K C Dharam Kumar for laser hair reduction, praising the doctor's professionalism and skill. The results were great.

community Hair Transplant in Poland vs Turkey

11 upvotes 1 week ago

A UK man considering a hair transplant is weighing options between Poland and Turkey, citing familiarity and perceived safety in Poland. He has been using minoxidil, microneedling, and finasteride but hasn't seen major improvements, and is advised to prioritize choosing a skilled surgeon over focusing on the country or cost.

community Hair has gotten much worse since starting Fin

34 upvotes 1 week ago

A 22-year-old experienced worsening hair loss after starting finasteride and reducing minoxidil dosage, considering a hair transplant but unsure due to potential hair regrowth. Suggestions include testing DHT levels, possibly switching to dutasteride, and consulting a dermatologist for a comprehensive diagnosis.

community No hair loss progress in 11 years. Why did my baldness stop?

21 upvotes 1 week ago

Hair loss can stop or slow down unpredictably, often due to genetic factors and hormone sensitivity. Some individuals experience early hairline changes that stabilize without treatment.

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Learn

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learn Hair Fibers

cosmetic product that temporarily makes hair appear thicker

Do hair fibers really make thinning hair look fuller, or is it just an illusion? Hair fibers create an optical illusion of fullness but do not actually thicken hair.
Can hair fibers be used along with medical treatments like minoxidil or finasteride? Hair fibers have no known interaction with minoxidil or finasteride, but no study has tested the combination.
Are hair fibers safe for sensitive scalps or people with dandruff and irritation? No study has tested hair fibers on sensitive or dandruff-prone scalps. Users are advised to wash them out daily, try a small area first, and stop if irritation appears.

learn Hair Multiplication

extract, clone, and reinsert your own hair cells

learn Hair Transplant

Surgery that moves hair follicles from the back of the scalp to thinning areas

Is a hair transplant painful? Clinics say local anaesthetic makes the procedure itself mostly comfortable, but the anaesthetic injections sting and soreness for a few days afterwards is common. Pain varies from person to person.
Is a hair transplant permanent? Transplanted hair usually lasts long term, but it is not guaranteed and the hair around it can keep thinning, so the overall result can change with time.

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Experts

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