There is no responsible universal panel. History and scalp examination guide selective evaluation for iron status, thyroid disease, androgen excess, nutritional factors or other causes; biopsy or specialist referral may be considered when the pattern is unclear.
Begin with chronology and examination
Sudden shedding after illness or childbirth differs from gradual patterned miniaturisation. Itch, scale, pain, scarring, broken hairs and grooming practices change the differential diagnosis.
The clinician should examine donor and recipient areas, hair shafts and follicular openings before turning to a checklist of laboratory abbreviations.
Evidence to request for the individual case
- Document onset and triggers
- Examine donor and recipient
- List symptoms and medicines
- Select tests by clinical question
- Interpret results professionally
- Consider biopsy or referral
- Resolve active disease before surgery
Use blood tests to answer a question
Iron, thyroid and selected nutritional investigations may be relevant when history or examination suggests them. Results need clinical interpretation; treating a borderline number without context can distract from the actual cause.
Supplements should follow identified need and safe dosing, not a clinic bundle. High doses can cause harm or interfere with tests.
Androgen evaluation is symptom-led
Clinical signs such as irregular cycles, hirsutism, acne or rapid virilisation can prompt evaluation for androgen excess and endocrine referral. Female pattern loss alone does not mean every androgen test is necessary.
Pregnancy potential and contraceptive context are important before medicines with fetal risk are discussed.
Some diagnoses need scalp biopsy or monitoring
Possible scarring alopecia or inflammatory disease may require dermoscopy, biopsy or treatment before surgery. Transplanting into active disease can give poor growth and further loss.
If diagnosis remains uncertain, serial photography and specialist review can be more valuable than booking around a travel date.
Where broad labels can mislead
This article describes diagnostic logic and does not order, interpret or set target values for laboratory tests.
- Universal expensive panel
- Supplement sold before results
- Lab number interpreted by salesperson
- Scarring signs ignored
- Pregnancy history omitted
- Surgery scheduled before diagnosis
Questions about diagnosis, anatomy and experience
- What diagnosis are we testing?
- Why is each blood test relevant?
- Could pregnancy affect medicines or timing?
- Do symptoms suggest androgen excess?
- Is biopsy indicated?
- What must be stable before surgery?
Questions about tests before female hair transplant
Does low ferritin always cause hair loss?
Iron status can be relevant, but causality and treatment depend on the whole clinical picture. Results need professional interpretation.
Should thyroid tests be routine?
They may be appropriate when history, symptoms or pattern indicate, but no single test panel suits every patient.
Can a scalp biopsy diagnose hair loss?
It can help distinguish selected inflammatory, scarring or pattern disorders when clinical assessment is insufficient.
Can normal tests prove I am a transplant candidate?
No. Donor supply, diagnosis, stability, recipient risk and expectations still need assessment.
Sources used in this guide
- 01American Academy of Dermatology — Hair-loss diagnosis and treatment
Clinical overview of history, scalp examination, selective blood testing or biopsy and evidence-led use of supplements only when a deficiency is found.
- 02Female pattern hair loss and androgen excess — multidisciplinary report
Evidence-graded recommendations on clinical assessment, androgen excess and when iron, thyroid, vitamin or other laboratory evaluation may be considered.
- 03Hair transplantation in women — literature review
Review emphasising diagnosis, systemic contributors, diffuse thinning, donor preservation and adjunct medical management in women.
- 04American Academy of Dermatology — Female pattern hair loss
Dermatology guidance on diagnosis, progression, treatment and why diffuse donor thinning can limit transplantation in some women.
Use it to organize research and questions for a named physician. It does not diagnose hair loss, determine candidacy or replace informed consent and an individual medical consultation.