Androgenetic Alopecia Treatment Protocol: A Framework for Clinics & Doctors
Published July 14, 2026 | Expert reviewed by team | Last updated: July 2026
This article is written for clinicians — hair transplant surgeons, dermatologists and aesthetic clinic doctors — rather than for patients. It outlines a framework, not a prescription, and assumes a clinical setting.
Most clinics have the tools to treat androgenetic alopecia well. What varies is structure: whether each patient is assessed, staged, photographed and reviewed the same way. A clear androgenetic alopecia treatment protocol is what makes results predictable — and makes an AGA service line commercially viable.
Start With Assessment and Staging
Before any treatment decision, the protocol begins with a standardised assessment:
- ✔ Pattern classification — Norwood-Hamilton for men; Ludwig or Sinclair for women.
- ✔ Trichoscopy — to confirm miniaturisation and exclude other causes of hair loss.
- ✔ History screening — thyroid, iron, medication and stress-related shedding as non-androgenetic contributors.
- ✔ Standardised baseline photography — consistent lighting, angles and distance.
Photography deserves particular emphasis. AGA changes are slow and incremental; without consistent baseline images, neither the clinic nor the patient can judge progress fairly — and disputes about “nothing is happening” become unanswerable. Staging also drives expectation-setting: early AGA with preserved follicles behaves very differently from advanced miniaturisation, and the consultation should say so plainly.
Separate the Male and Female Pathways
AGA is not one condition with one protocol.
Men
The pattern is typically frontal and vertex. Conventional first-line medical therapy is well established, and in-clinic procedures are layered on top for patients who want to accelerate results or who prefer non-systemic options. In-clinic exosome-based regeneration vials fit here as an adjunct alongside the patient’s ongoing medical regimen — not as a replacement for it.
Women
The pattern is usually diffuse thinning over the crown with a preserved frontal hairline. Female AGA more often warrants screening for contributing factors, and several systemic options used in men are unsuitable. This is precisely where non-systemic in-clinic support becomes attractive: it lets the clinic offer an active treatment to women who cannot, or prefer not to, use certain medications.
Sex-specific formulations matter for the same reason. Ranges built around this split — matching the vial to the patient’s sex and pattern rather than applying one generic formula — are set out in Ossome’s guide to an androgenetic alopecia clinic treatment protocol.
Build the In-Clinic Procedure Protocol
For patients who opt for in-clinic treatment, the usual structure is an induction phase followed by maintenance: a series of sessions spaced two to four weeks apart, pairing a regeneration vial with a delivery device (microneedling, electroporation or roller), then maintenance sessions at longer intervals once a response is established.
Exact spacing should follow your clinic’s protocol and the patient’s response — there is no single universal schedule. The principles that do hold: standardised dosing per session, consistent technique, and device-assisted delivery.
A Sample Staged Protocol
| Stage | What happens | Role of the in-clinic vial |
|---|---|---|
| Assessment | Classification, trichoscopy, baseline photos, screen for non-AGA causes | — |
| Pathway selection | Fork by sex and pattern; agree medical + in-clinic plan | Select formulation by sex |
| Induction | Device-paired in-clinic sessions, 2–4 weeks apart | Regeneration vial each session |
| Review | Re-photograph and reassess against baseline | Adjust frequency on response |
| Maintenance | Spaced sessions plus ongoing medical therapy | Continue at longer intervals |
A framework to adapt to your clinic — not a fixed prescription.
Managing Expectations and Review
AGA is chronic and progressive. Even a well-run protocol manages rather than cures it, and stopping treatment generally means the underlying process resumes. Scheduled review with side-by-side photography against baseline — plus clear communication that maintenance is ongoing — is what keeps patients engaged and prevents the mid-course drop-off that kills results.
Review is also the decision point: adjust session frequency, address an adjacent indication (a seborrheic component, for instance), or escalate medical therapy.
Sourcing for an AGA Service Line
A clinic running an AGA service needs a dependable supplier: consistent batches, sex-specific formulations, and clear protocol guidance. When evaluating exosome-based products, be sceptical of exosome count as a headline metric — it is a marketing number, not a clinical one. Purity, source and the quality of the biologic blend matter more, and plant-derived sources are the most straightforward option for scalp use from an ethical and regulatory standpoint.
Frequently Asked Questions
How many induction sessions should a protocol include?
Commonly a series spaced 2–4 weeks apart, with the number determined by staging and response. There is no universal schedule — set one for your clinic and apply it consistently so outcomes are comparable.
Do in-clinic vials replace medical therapy?
No. They complement it. In-clinic procedures are layered on top of the patient’s medical regimen, and are particularly useful for patients for whom systemic options are unsuitable or unwanted.
Why is device-assisted delivery necessary?
Intact scalp is an effective barrier. Without microneedling, electroporation or a roller to create channels, a topical vial largely sits on the surface and under-delivers to the follicle.
How should female AGA be handled differently?
Screen more thoroughly for contributing factors, expect a diffuse crown pattern with a preserved hairline, and recognise that several systemic options used in men are unsuitable — making non-systemic in-clinic support especially valuable.
Final Thoughts
The clinics that get consistent AGA results are rarely the ones with the newest device. They are the ones with a protocol: everyone assessed the same way, staged the same way, photographed the same way, and reviewed on a schedule. Build that structure first — the products slot into it afterwards.
Educating patients alongside treatment? Point them to our patient-facing guides on the best hair loss treatments in Singapore and the men’s scalp care routine.
This article is intended for healthcare professionals and is not a substitute for individual clinical judgement or, where indicated, systemic prescribing.
