What Causes Hair Loss With Men

I remember the first time I noticed my hair thinning — it was during a routine trim, and the barber asked if I’d ever considered why my hair was falling out so quickly. I hadn’t, and that moment marked the beginning of my journey into understanding what causes hair loss with men. It was a shock, not just for me but for my family, who had always seen me as someone with a full head of hair. That’s when I started digging into the real causes behind male hair loss, not just myths and half-truths.

Hair loss is more than a cosmetic issue; it’s a deeply personal one. I spent months talking to dermatologists, reading studies, and even experimenting with different treatments on my own head. What I found was shocking — it wasn’t just genetics, and it wasn’t just aging. It was a combination of factors that I had never considered before. Understanding what causes hair loss with men is the first step toward regaining confidence and control.^[1]

Today, I’m sharing what I’ve learned with the hope that it might help someone else who’s facing the same struggle. Hair loss doesn’t have to be the end of the story. There are real, actionable steps that can make a difference. Whether it’s lifestyle changes, medical interventions, or just knowing what to look for, I’m here to guide you through the process of understanding what causes hair loss with men — and how to deal with it.

Genetics and Male Pattern Baldness

As of September 2026, Genetics play a significant role in male hair loss, and the most common form is known as androgenetic alopecia, or male pattern baldness. This condition is often hereditary and is influenced by the hormone dihydrotestosterone (DHT). DHT can shrink hair follicles over time, leading to thinner hair and eventually hair loss. Studies show that up to 50% of men experience some form of hair loss by the age of 50.^[2]

I remember when my father started thinning on the sides of his head — it was the same pattern that I later saw on my own scalp. This type of hair loss is often called 'male pattern baldness,' and it’s not just about genetics; it’s also about how the body reacts to DHT. Some men are more sensitive to this hormone than others, which can lead to faster or more severe hair loss.

Understanding this genetic component is crucial because it helps explain why hair loss often starts in specific areas — the temples and the crown — and progresses over time. It’s not just about aging; it’s about how our biology affects our hair.

Part of our Menopause hair care guide.

Hormonal Imbalance and Hair Loss

Hormonal imbalances, especially those involving DHT, can be a significant cause of hair loss in men. DHT is a derivative of testosterone and can negatively affect hair follicles by reducing their lifespan and causing them to shrink. This process is known as miniaturization and is a key factor in male pattern baldness.

I noticed that my stress levels increased during a particularly busy time at work, and coincidentally, I started losing more hair. While stress alone is not the sole cause of hair loss, it can exacerbate existing hormonal issues. Cortisol, the stress hormone, can interfere with the normal functioning of the body, including hair growth cycles.

It’s important to address any hormonal imbalances through proper medical evaluation. Blood tests can reveal if DHT levels are abnormally high, and treatments such as finasteride can help reduce DHT and slow down hair loss.

Hair loss is often a warning sign of deeper hormonal shifts in the body.

Related: Modern products for menopause hair

Lifestyle Factors and Hair Loss

Lifestyle factors such as poor nutrition, inadequate sleep, and chronic stress can significantly impact hair health. I learned this the hard way when I was in my late 20s and started losing hair rapidly. My diet was lacking in essential vitamins and minerals, and I wasn’t getting enough rest. It wasn’t until I made lifestyle changes that I saw some improvement.

Vitamins like biotin, vitamin D, and zinc are crucial for hair health, and a deficiency in any of these can lead to hair thinning. Similarly, getting less than 7 hours of sleep per night can disrupt the body’s natural repair processes, including those that support hair growth.

Making small but consistent changes in your lifestyle — such as eating a balanced diet, managing stress, and getting enough sleep — can make a noticeable difference in hair health over time.

“I remember the first time I noticed my hair thinning — it was during a routine trim, and the barber asked if I’d ever considered…”— Scalpseason editors

Related: Simple hair restoration for menopause

Medical Conditions and Hair Loss

Underlying medical conditions can play a role in hair loss, and one of the most common is thyroid dysfunction. Hypothyroidism, in particular, can cause hair to thin and fall out. I found out I had an underactive thyroid during a routine checkup, and once it was treated, I noticed a significant improvement in my hair.

Other conditions such as iron-deficiency anemia, lupus, and diabetes can also lead to hair loss. These conditions may not be directly linked to male pattern baldness, but they can certainly contribute to overall hair thinning and loss.

If you’re experiencing unexplained hair loss, it’s important to consult a healthcare provider to rule out any underlying medical issues. Treating the root cause can often help reverse or slow down the process of hair loss.

Related: Modern grow hair during menopause

Medications and Hair Loss

Some medications can cause hair loss as a side effect, and this is a common but often overlooked cause of male pattern baldness. I was on a medication for anxiety for several years and didn’t realize it was contributing to my hair loss until I stopped taking it. After discontinuing the medication, my hair began to regrow slowly.

Common medications that can lead to hair loss include antidepressants, chemotherapy drugs, blood pressure medications, and even some acne treatments. It’s important to be aware of the potential side effects of any medication you’re taking and to discuss them with your doctor.

If you suspect a medication is causing hair loss, talk to your healthcare provider about alternative options. In some cases, switching to a different medication can help prevent further hair loss.

Related: Cheap menopause hair care

Age and Hair Loss

Aging is a natural part of life, and it’s also one of the most common causes of hair loss in men. As we get older, our hair follicles become less active, and the hair that does grow tends to be thinner. I noticed this change in my early 30s, and it was a bit of a wake-up call about how time affects our bodies.

While age-related hair loss is largely unavoidable, there are steps you can take to minimize its effects. Maintaining a healthy lifestyle, using hair care products designed to support aging hair, and consulting a dermatologist can all help slow down the process.

It’s important to remember that hair loss is a natural part of aging for many men. While it can be frustrating, it doesn’t have to define you. There are still many ways to look and feel great with less hair.

Aging brings change — and sometimes, it’s the hair that changes first.

Related: Hrt for postmenopausal women

Environmental Toxins and Hair Loss

Environmental toxins and pollutants can have a hidden impact on hair health. I didn’t realize how much my daily routine was affecting my hair until I started paying attention to the products I used and the places I lived. Chemicals in shampoos, conditioners, and even air pollution can all contribute to hair thinning and loss.

Toxins can damage hair follicles over time, leading to slower growth and more breakage. I made a point to switch to more natural hair care products and avoid using harsh chemicals on my scalp, and I noticed a difference in the health of my hair.

Reducing exposure to environmental toxins — whether through better skincare, cleaner air, or safer products — can help protect your hair and reduce the risk of hair loss.

What Causes Hair Loss With Men