The Link Between Testosterone and Hair Loss

Testosterone often takes the blame for hair loss. But the impact the male sex hormone has on how your hair grows — and sheds — isn’t clean cut. 

Scientific research links testosterone to both men’s hair loss and hair loss in women. But it’s an indirect link at best. 

A bunch of other factors are also involved: sensitive hair follicles, the activities of another potent hormone, and genetics. 

So how big a role does testosterone play in hair loss? It gets a little technical but we’ll keep it simple. Read on to learn more about the science, treatment options, and FAQs.

How Do Testosterone Levels Affect Hair Growth? 

Different types of testosterone exist in your body (more on that in the FAQs). But when it comes to hair growth, we’re only concerned with one: free testosterone.

Some testosterone binds to proteins in your body. The rest is called free testosterone, which enzymes can convert into (*deep breath*) dihydrotestosterone (DHT). 

DHT is a much more potent hormone than testosterone and far more responsible for hair growth — or loss.

We know this because studies show that men with baldness can have lower levels of free testosterone but higher levels of the enzyme that converts it into DHT

What does this mean? Increasing testosterone doesn’t necessarily cause hair loss.

DHT is responsible for the growth of pubic and body hair. But it also shrinks follicles — the pores in your skin that contain hair — and makes it harder for hair to grow

So DHT plays a key role in male and female pattern hair loss. But there’s more to it than that.

Let’s start with genetics. Your hair follicles have receptors that interact with DHT and testosterone. Genetics will determine how sensitive and how prolific these receptors are. 

Sensitive receptors will react to even the tiniest amounts of DHT, making you more prone to hair loss. And the more receptors you have, the more likely you are to experience hair loss.

TL;DR? There are 4 main things that contribute to hormonal hair loss:

  • Sensitive hair follicles
  • Higher numbers of receptors on the hair follicles
  • High levels of DHT-converting enzymes 
  • DHT itself

Armed with that knowledge, how do we tackle hormone-induced hair loss?

Treatment Options for Testosterone-Induced Hair Loss

Almost all types of hair loss — including genetic and hormonal hair loss (called androgenetic alopecia) — can be treated. The trick is to get to the root of the problem as early as possible. 

Different treatment options have different outcomes. Cosmetic solutions are costly and come with big risks. Yet little evidence supports laser light therapy and nutritional supplements for hair loss. 

But medication that stops hair loss at its roots can work. Effective hair loss medication stops DHT in its tracks and stimulates hair growth at the same time.

Nutritional Review

Many people with hair loss head straight to the supplements aisle at the local pharmacy to pick up the latest elixir for hair growth.

Some supplements do help but the jury’s out on most hair growth supplements, with studies producing mixed results. 


Biotin helps increase and maintain levels of keratin — the protein present in your hair (and nails and skin). It may help enhance hair growth but the body usually gets all the biotin it needs from a varied and balanced diet.

Pumpkin Seed Oil

Pumpkin seed oil is another popular choice. There’s evidence to suggest that pumpkin seed oil may inhibit the enzymes that produce DHT.


Iron deficiencies are often associated with hair loss. So if you have androgenic alopecia or telogen effluvium, along with low iron levels, doctors may recommend iron supplements. 

Vitamin C supplements help with iron absorption and may be recommended as well. 


There’s a correlation between low zinc levels and hair loss. Case studies suggest that zinc supplements may assist with hair growth.

Cosmetic Solutions 

There are two popular cosmetic procedures:

  • Follicular unit transplantation (FUT) involves removing skin from one hairier part of your scalp, removing follicles from that strip of skin, and reinserting the follicles into bald spots.
  • Follicular unit extraction (FUE) involves removing follicles directly from the scalp, without removing any skin, and transplanting them to bald spots.

Hair transplants are a costly and complicated surgical procedure to fix hair loss. You may need multiple treatments and risks include scarring and infections. 

Low-Energy Laser Light Therapy LLLT)

LLLT is believed to promote hair growth by reducing inflammation in the follicles associated with some types of hair loss, such as alopecia areata. 

Since few studies support the effectiveness of LLLT for hair loss, we still don’t know enough about this treatment as a long-term solution. 

Prescription Medication 

Studies have shown that medications that stop testosterone from converting into DHT can delay the progress of androgenetic alopecia. 

Finasteride is a common prescription medication that binds to enzymes and prevents them from converting testosterone into DHT. 

The Hairy Pill® is another option. It’s a patented hair loss treatment that’s personalised to you and the underlying technology has been clinically proven to work. It contains active ingredients that can stop hair loss in its tracks and stimulate regrowth. 

Testosterone Hair Loss in Women 

Men are more likely to experience the effects of testosterone but that doesn’t mean women are immune to it. 

Women have a tiny amount of testosterone in their body — 10 to 20 times less than men. But that’s still enough to affect androgenetic alopecia or female pattern hair loss.

DHT interacts with hair follicles in females in the same way it does with men, although the pattern of hair loss is different in women. 

For women, thinning occurs over the top of the head, usually identified by a widening part. Women don’t generally get a receding front hairline.

FAQs on Testosterone-Related Hair Loss 

What are the different forms of testosterone?

There are three main types of testosterone:

  • Testosterone that binds to the albumin protein in the blood
  • Testosterone that binds to the sex hormone-binding globulin protein and is inactive 
  • Free testosterone, which doesn’t bind to any protein

Dihydrotestosterone (DHT) is a potent type of hormone made from testosterone by the 5-alpha reductase enzyme. 

What are the symptoms of low testosterone?

Low testosterone is a condition (called male hypogonadism) that can affect a range of things, from bone density and muscle mass to sex drive. 

Symptoms of low testosterone in adult men include:

  • Reduce sex drive
  • Shrinking testicles
  • Low (or no) sperm count
  • Erectile dysfunction
  • Loss of armpit and pubic hair
  • Hot flashes
  • Difficulty concentrating
  • Increased body fat
  • Reduce muscle strength and mass

Low testosterone itself doesn’t usually cause hair loss but its treatment might.

Can testosterone injections cause hair loss?

Testosterone injections — a form of testosterone replacement therapy (TRT) —  correct low testosterone in men. A side effect is that they may speed up the progress of male pattern baldness. 

Hair Loss from Testosterone Is Reversible with Our Hair Loss Medication

It’s possible to reverse most types of hair loss, including hair loss caused by genetics or testosterone. You just need to act early.

The Hairy Pill® treatment can help prevent hair loss while stimulating regrowth. The best part? It’s just one pill, taken daily. Get started on the treatment in just 5 minutes.

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