Do vellus hairs always have to be light-colored?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: September 30, 2026 • View editorial policy

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question

Da li velusne dlake uvijek moraju da budu svijetle?

Ne, velusne dlake ne moraju uvijek biti svijetle boje. Definicija velusnih dlaka se zasniva na njihovoj veličini i strukturnim karakteristikama, a ne na boji.

Definicija velusnih dlaka

Prema vodičima Endokrinološkog društva i PCOS komiteta, velusne dlake su definisane kao dlake promjera manjeg od 0,03 mm koje nemaju pripojenu arrector pili mišić 1. Ova definicija se zasniva isključivo na:

  • Dijametru dlake (< 0,03 mm)
  • Odsustvu arrector pili mišića
  • Ne na boji ili pigmentaciji

Pigmentacija velusnih dlaka

Istraživanja jasno pokazuju da velusne dlake mogu biti pigmentirane:

  • Velusne dlake mogu sadržavati melanin i pokazivati različite nivoe pigmentacije 2, 3
  • Studije o fotoepilaciji potvrđuju postojanje nepigmentiranih velusnih dlaka kod nekih pacijenata, ali to implicira da postoje i pigmentirane velusne dlake 4
  • Istraživanje o UV transmisiji kroz dlaku opisuje "vellus-like" dlake koje mogu imati različite optičke karakteristike, što ukazuje na varijabilnost u pigmentaciji 2

Klinički značaj

U kontekstu gubitka kose kod žena (FPHL):

  • Histološka analiza pokazuje povećan omjer terminalnih prema velusnim dlakama
  • Velusne dlake mogu kontinuirano biti konvertovane u terminalne pigmentirane dlake kada postoji višak androgena 5
  • Ova konverzija uključuje promjene u veličini i strukturi, ali ne nužno u pigmentaciji

Zaključak za kliničku praksu

Kada procjenjujete tip dlake:

  • Fokusirajte se na dijametar (< 0,03 mm za velusne)
  • Provjerite prisustvo arrector pili mišića (odsutan kod velusnih)
  • Ne koristite boju kao dijagnostički kriterijum za razlikovanje velusnih od terminalnih dlaka

Velusne dlake mogu biti svijetle, tamne, ili bilo koje boje između, zavisno od genetskih faktora i prisustva melanina u folikulu 6, 3.

References

3
Research

Luminescence and other photoprocesses in hair follicles in the disorder Trichostasis spinulosa.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2026

4
Research

Treatment of terminal and vellus non-pigmented hairs with an optical/bipolar radiofrequency energy source-with and without pre-treatment using topical aminolevulinic acid.

Journal of cosmetic and laser therapy : official publication of the European Society for Laser Dermatology, 2005

6
Research

Human hair pigmentation--biological aspects.

International journal of cosmetic science, 2008

Related Questions

Does pubic hair initially appear as fine, lightly pigmented vellus hair before maturing into terminal hair?
Do vellus hairs need to be less than 1 mm in length?
Why are some of my chin hairs depigmented and coarse?
A 10‑day postpartum woman presents with dysuria and a urine culture growing mixed microbiota >100,000 CFU/mL; how should this be managed?
In a 10‑month‑old infant with a slightly indented coronal suture, normal fontanelles, and appropriate head growth, what is the appropriate next step in management?
What discontinuation symptoms might a person with bipolar disorder experience after missing two days of quetiapine (Seroquel) 50 mg?
Is amiodarone safe to use in a patient with left bundle‑branch block?
In a female resident with recurrent urinary tract infections, dementia, diabetes mellitus, chronic kidney disease stage 3b, and a penicillin allergy who is currently receiving fosfomycin 3 g orally daily, and whose prior urine culture (collected before the current treatment) grew multidrug‑resistant Klebsiella pneumoniae and Proteus mirabilis, should we reassess her current symptoms and obtain a repeat urinalysis with microscopy, a urine culture if symptomatic, and a complete blood count and basic metabolic panel before deciding whether to discontinue fosfomycin or switch to a culture‑directed regimen?
What are the recommended medication options and dosing guidelines for treating ADHD in children aged 6 to 12 years?
Is an 88-year-old man with atrial fibrillation, active hematuria, orthostatic hypotension, and intolerance to beta‑blockers a candidate for aspirin and apixaban (Eliquis)?
When should oral prazosin be started and how often repeated in children with scorpion envenomation?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.