Have you noticed your hairline is receding? Or maybe you’re seeing more hair in the shower drain each morning? If this sounds familiar, you’re not alone. Hair loss affects millions of people, and in most cases, the culprit is the same: androgenetic alopecia.
Androgenetic alopecia (AGA) is the medical term used for pattern hair loss. It’s the most common type of hair loss in both men and women, with about 95% of hair loss cases in men being caused by AGA. Women do suffer from it as well, though it often looks different.
The good news? Understanding what causes androgenetic alopecia is the first step to treating it. And these days, there are real options available.
What Causes Androgenetic Alopecia?
Two things work together to cause androgenetic alopecia: your genetics and a hormone called dihydrotestosterone (DHT).
You inherit genes from your parents that make your hair follicles sensitive to DHT. If you have these genes, your follicles will start to shrink when exposed to DHT. Follicles that shrink produce thinner, shorter hair, and eventually, they may stop producing visible hair altogether.
DHT is a hormone that comes from testosterone. Your body makes DHT using an enzyme called 5-alpha reductase, and for some people, having DHT in the scalp is no problem, but for others, their hair follicles overreact to it.
The DHT Connection
DHT attaches to receptors on your hair follicles. Think of it like a key fitting into a lock – if your follicles have the right “locks” for DHT, the hormone will trigger them to shrink. This shrinking is called miniaturization.
Hair follicles (beneath the skin) produce hair shafts, which are the visible strands we see coming from the scalp. When a follicle miniaturizes, it produces shorter and thinner hairs over time. These hairs don’t stay in the growth cycle for as long, so they shed more quickly. What used to be a thick, long hair becomes a short, thin one.
The tricky part is that DHT affects different parts of your scalp in different ways. Hair on the top and front of your head is usually more sensitive to DHT, while hair on the sides and back of your head is usually less sensitive. That’s why you see people with hair loss at the hairline and crown but still with hair on the sides.
Why Some Hair Follicles Are Sensitive to DHT
If you have androgenetic alopecia, your hair follicles are genetically programmed to be sensitive to DHT. This sensitivity runs in families. Some people are born with follicles that will react to DHT, while others have follicles that won’t.
This is why you can’t catch androgenetic alopecia from someone else. You’re born with it.
The Genetic Component: It’s Not Just About Your Mom
A common myth about baldness is that you only inherit it from your mother’s side of the family. That’s not true.
The truth is more complicated, but also more fair. You can inherit androgenetic alopecia from your mom, your dad, or both. Scientists have found that multiple genes on different chromosomes control whether you’ll develop pattern hair loss, not just one gene.
Studies show that about 80% of men who are bald have fathers who were also bald. That tells us that the paternal line matters just as much as the maternal line.
The bottom line is this: if your parents, grandparents, uncles, or aunts had androgenetic alopecia, you’re more likely to get it, too. But it’s not a guarantee. Genetics set the stage, but other factors come together to make the condition manifest.
How Androgenetic Alopecia Progresses
Androgenetic alopecia doesn’t happen overnight; it takes time. Sometimes it’s quick, and sometimes it’s slower.
Doctors use a tool called the Norwood Scale to measure how much hair loss males have. It ranges from Stage 1 (no real hair loss) to Stage 7 (very significant hair loss). Most people progress gradually through the stages. Some men will stay at Stage 2 for decades, while others move more quickly.
How fast you lose hair depends on your genes and your hormone levels. If hair loss runs strongly in your family and your DHT sensitivity is high, you might progress faster. If you have a gentler genetic predisposition, progression might be slower.
The key thing to understand is that once a hair follicle fully dies, it’s gone for good. That’s why early treatment is so important.
Why Early Treatment Matters
When it comes to androgenetic alopecia, timing is everything.
When DHT first starts to shrink your hair follicles, they’re still alive. They’re miniaturized, yes, but they can be revived. If you treat them with medication like minoxidil or finasteride, you can slow or even stop the shrinking. You might even regrow some hair.
But wait too long, and the follicles may die completely. Once that happens, medication won’t help. The only option left is a hair transplant.
That’s why dermatologists and hair surgeons always say the same thing: start treatment early. Don’t wait. If you notice hair thinning or a receding hairline, talk to a doctor about it. Even if you’re not ready to treat it aggressively, knowing you have androgenetic alopecia is valuable information. And while we don’t have crystal balls, a dermatologist may be able to advise you of your long term prognosis.
Treatment Options for Androgenetic Alopecia
The good news is that androgenetic alopecia is treatable. You have options.
Medical Treatments
Minoxidil and finasteride are the two FDA-approved medications for androgenetic alopecia. In their FDA-approved forms, minoxidil is a topical treatment that you apply directly to your scalp, while finasteride is an oral medication, which you take by mouth.
Finasteride works by reducing DHT in your body. Less DHT means less stress on your hair follicles. Minoxidil seems to extend the growth phase of hair and increase blood flow to the scalp.
Studies show that using both medications together work better than either one alone. In one study, 94% of men using the combination saw improvement compared to 80% using finasteride alone.
Another treatment option is PRP, or platelet-rich plasma. This involves drawing your own blood, processing it to concentrate the platelets, and injecting it into your scalp. The idea is that growth factors in the platelets stimulate your hair follicles. Research suggests that combining PRP with minoxidil produces even better results.
For more information about minoxidil and how it works, check out our complete guide to minoxidil and your questions answered.
Hair Transplants – When Surgery Is the Right Choice
If your androgenetic alopecia has progressed significantly, or if you prefer a more permanent solution, a hair transplant might be the right option for you.
Hair transplants work because hair on the sides and back of your scalp is usually resistant to DHT. Surgeons move hair follicles from these DHT-resistant areas to areas where you’ve lost hair. The transplanted hair keeps its original characteristics, and it won’t fall out the same way as your original hairline or crown hair.
The most common technique today is FUE, which stands for Follicular Unit Extraction. Surgeons remove individual hair follicles one at a time and transplant them to the balding areas. It’s precise and leaves minimal scarring.
Learn more about the differences between hair transplant techniques in our guide to FUE vs. FUT: choosing the right transplant method.
What You Can Do Next
If you’re experiencing hair loss and think you might have androgenetic alopecia, the first step is to get a proper diagnosis. A dermatologist or hair restoration surgeon can evaluate your hair loss pattern and explain what’s happening.
Once you understand what you’re dealing with, you can make an informed decision about treatment. Whether you choose medication, PRP, a transplant, or a combination of approaches, knowing the cause of your hair loss puts you in control.
Androgenetic alopecia doesn’t have to define your appearance. Modern treatments work. The key is to start early and stay consistent.
At Limmer Hair Transplant Center in San Antonio, we have decades of experience helping people treat androgenetic alopecia. Whether you’re at an early stage or have significant hair loss, we can help you find the right solution.
Schedule a consultation with us today. Let’s talk about your hair, your goals, and your options.
Contact Limmer Hair Transplant Center to book your appointment.
