Androgenetic Alopecia: Diagnosis and Treatment

What is Androgenetic Alopecia?

Androgenetic alopecia is a type of progressive hair loss that does not leave scars and is associated with genetic predisposition. It can occur in different patterns in men and women.

In the basic process, hair follicles don't disappear completely all at once; over time they miniaturize and begin to produce finer and shorter hair strands.

Therefore, early detection is important. The goal of treatment is often not only to stimulate new hair growth, but also to protect existing hair and slow the progression of the disease.

How does it appear in men?

Most frequent:

receding temples,

receding hairline,

Thinning in the hilltop area,

expansion of these areas over time

It is seen.

However, not everyone follows the same pattern.

How does it appear in women?

More common in women:

widening of the median dividing line,

Widespread thinning in the hilltop region,

gradual decrease in hair density

visible.

The front hairline is often better preserved in men than in women.

Female pattern hair loss does not always involve a significant excess of androgens. Therefore, it is not accurate to say that "if a woman has androgenetic alopecia, there is necessarily a hormonal imbalance.".

Why does this happen?

Genetic predisposition is a key factor.

In men, androgen sensitivity, and particularly the effect of dihydrotestosterone on androgen-sensitive follicles, plays a significant role.

In women, the mechanism is more heterogeneous and cannot be explained solely by androgen levels.

As a result, the hair growth cycle shortens, and the follicle produces progressively finer terminal hairs.

If my father isn't bald, why can't I be?

No.

Androgenetic alopecia is not a simple inheritance pattern caused by a single gene. Genetic predisposition from both the mother and father can play a role.

Therefore, the absence of significant hair loss in the family does not rule out the disease.

How is the diagnosis made?

In most patients:

story,

pattern of hair loss,

scalp examination

This can be used to diagnose the condition.

Trichoscopy

Trichoscopy is useful for supporting the diagnosis and differentiating it from other types of hair loss.

Androgenetic alopecia can particularly manifest as variations in hair diameter and miniaturized hairs. Current guidelines and reviews consider trichoscopy an important辅助 method in routine clinical evaluation.

Do all patients need a blood test?

No.

Extensive laboratory investigation is often not necessary in typical male-pattern androgenetic alopecia.

In women or atypical cases:

significant menstrual irregularity,

hirsutism,

sudden start,

widespread diffuse hair loss,

findings suggestive of systemic disease

Targeted investigations may be necessary, if any.

Is androgenetic alopecia treatable?

Yes, but it's a chronic process.

The main goals of treatment are:

Slowing down progress.

To preserve existing hair.

To achieve thickening in miniaturized hair in suitable patients.

To evaluate hair transplantation in patients who need and are suitable candidates.

Some of the gains achieved by discontinuing treatment may be lost over time.

Minoxidil

Topical minoxidil has long been one of the primary treatments used for male and female pattern hair loss.

In recent years, low-dose oral minoxidil has also become increasingly popular; however, this use is off-label for hair loss in many countries and requires medical evaluation due to systemic side effects.

The 2025 Canadian consensus considered both topical and oral minoxidil among the recommended treatments.

Finasteride and dutasteride

These medications reduce DHT formation by inhibiting the 5-alpha reductase enzyme.

These are important treatment options, especially in male androgenetic alopecia.

Finasteride is one of the long-used treatments. Dutasteride provides stronger 5-alpha reductase inhibition and is included as an option in some consensus for suitable patients.

The 2024 Spanish and 2025 Canadian consensuses consider finasteride and dutasteride as treatment options.

However, these medications are not suitable for everyone; potential side effects, pregnancy risks, and individual patient characteristics must be considered.

Antiandrogen treatments in women

Antiandrogen therapies such as spironolactone may be considered in suitable female patients.

This may be particularly significant in some female patients, especially those with associated hormonal factors.

However, hormonal treatment is not automatically prescribed to everyone with female pattern hair loss.

Does platelet-rich plasma (PRP) work?

PRP is one of the辅助 treatment options in androgenetic alopecia.

The 2025 Canadian consensus considered PRP among the recommended treatments. However, it is not accurate to say that "PRP is the standard treatment for all hair loss" because there are significant differences between protocols.

Microneedling

Microneedling has also been considered, particularly as an adjunct to other treatments.

It is among the options recommended in the 2025 Canadian consensus; however, we will not present it as a standalone replacement for primary treatments.

Hair mesotherapy

At this point, a particularly cautious assessment is needed.

“Hair mesotherapy” is not a single standard treatment; the content, dosage, and injection protocols can vary.

Therefore, we will not present the scientific evidence at the same level as powerful treatments.

Do vitamins promote hair growth?

If there are any shortcomings, it is important to correct them.

However, in patients with androgenetic alopecia who have normal laboratory values, the use of vitamins or supplements alone is not expected to stop genetic follicle miniaturization.

In the 2025 Canada consensus, many popular supplements or cosmetic ingredients are not recommended due to insufficient evidence.

How long does it take for the treatment to work?

Hair biology is slow.

Most treatments require months to assess clinical changes. The 2025 review also emphasizes that it often takes at least about 6 months to see a significant clinical change.

Therefore, constantly changing treatment because results are not seen in 3-4 weeks is not correct.

When should hair transplantation be considered?

Hair transplantation may be considered in suitable androgenetic alopecia patients.

But first:

type of hair loss,

disease progression,

The need to protect existing hair,

density and quality of the donor area,

patient's age and expectations

It should be evaluated.

The 2024 Spanish consensus also addresses hair transplantation as part of AGA governance.

Why is DUPA important?

Diffuse Unpatterned Alopecia (DUPA) is considered a pattern that differs from classic androgenetic alopecia in that significant miniaturization and diffuse thinning can also be found in the donor area.

This is especially important in terms of hair transplantation because:

The assumption that the donor area is permanent and safe may not be true for every patient.

Therefore, when planning a hair transplant, not only the area with baldness but also the donor area should be evaluated trichoscopically.

Conditions that can also affect the donor area, such as diffuse pattern androgenetic alopecia, are particularly important when evaluating suitability for hair transplantation.

When should you consult a dermatologist?

If your hairline is receding,

if the central divide widens,

If the hilltop area is becoming increasingly sparse,

If there is a significant history of hair loss in the family,

If there is rapid progression at an early age,

If hair transplantation is being considered,

If it is unclear whether the hair loss is androgenetic

Dermatological evaluation is appropriate.

Frequently Asked Questions

Can androgenetic alopecia be completely stopped? The answer is not the same for everyone. Treatment can significantly slow progression and improve hair density in many patients.

Will hair fall out again if treatment is stopped? Because chronic genetic predisposition persists, some of the gains achieved with treatment may be lost over time.

Does finasteride cause sexual side effects? Sexual side effects can be reported. A risk-benefit assessment should be done on an individual basis; therefore, self-medication based on online sources is not advisable.

Can oral minoxidil be given to everyone? No. Due to its systemic effects, blood pressure, cardiovascular history, medications being used, and other factors should be evaluated.

Is PRP or minoxidil better? These treatments don't belong in the same category or have the same level of evidence. Treatment plans are tailored to the patient's specific characteristics;辅助 methods are not automatic alternatives to primary treatments.

Does hair transplantation treat androgenetic alopecia? Hair transplantation involves relocating the follicles; it does not stop the underlying progressive androgenetic process. Therefore, long-term management of existing hair is also important.