Manage Your Energy

Reaching your 30s and 40s can mean big changes. You’ve likely settled into your career, perhaps started a family, or simply grown into your true self. Yet, these decades also come with new experiences—like longer recovery times after a night out, that occasional creaky knee, and for many, the first signs of hair loss.

Noticing a receding hairline or thinner patches up top? You’re far from alone. Changes in hair with age are incredibly common, and they can take a lot of us by surprise. But here’s some good news: you’re not helpless, and hair loss doesn’t have to define how you view yourself.

Here’s your friendly guide to understanding what’s happening, accepting what you can’t change, and taking action where it matters.

Biology is at Play

Most men will experience some hair thinning by their mid-30s. It may happen earlier for some, or in gradual stages for others. By 50, about 85% of men will notice notable hair loss—a figure consistent whether you’re in Galway or Glasgow.

The main culprit is androgenetic alopecia, or male pattern baldness, driven largely by genetics and a hormone called DHT (dihydrotestosterone). DHT causes hair follicles to shrink, resulting in finer, shorter hairs—and eventually, no hair at all.

Understanding that hair loss is a natural part of biology (not something you caused) is the first step in reclaiming control.

Considering Stress, Diet, and Lifestyle

While DHT is a primary trigger, it’s not the only factor. Your 30s and 40s can bring increased stress—more responsibilities, job pressures, maybe sleepless nights if you have young children.

Stress can lead to telogen effluvium, a type of hair shedding caused by hormonal and nervous system changes. Diet is crucial too: insufficient iron, zinc, or vitamin D can affect hair health. And lifestyle choices that didn’t matter in your 20s—like skipping meals or …

For many men, the reality of hair loss can appear much sooner than anticipated, sometimes even in their twenties. Often, it begins with slight changes: a hairline that starts to retreat, more strands clogging the shower, or a thinning area at the top of the scalp. Like men worldwide, Irish men may find these changes quietly impacting their confidence, sense of self, and overall wellbeing.

As awareness of men’s health issues has increased, so has the interest in treatment options. One name that frequently surfaces is finasteride. But can it truly halt hair loss permanently? And what does “permanently” even mean when dealing with a gradual and genetic condition such as male pattern baldness?

This article delves into the science of finasteride, how it operates, who it benefits, and why, while it may not be the miracle some hope for, it remains a significant aid to many.

The Core Problem: Understanding DHT 

To appreciate how treatments like finasteride work, it’s crucial to first understand the primary culprit behind most men’s hair loss: DHT, or dihydrotestosterone.

DHT is a hormone that derives from testosterone. While it’s essential during puberty and plays a role in male characteristics, it also attaches to hair follicles on the scalp in men who are genetically inclined to hair loss. Over time, DHT causes these follicles to shrink—a process known as follicular miniaturisation—leading to finer, weaker hair until the follicle ceases to produce visible hair.

Male pattern baldness, or androgenetic alopecia, results from this process. This is where finasteride proves beneficial.

The Functionality and Limitations of Finasteride 

Finasteride is a DHT inhibitor. By hindering the enzyme 5-alpha-reductase (which converts testosterone to DHT), it lowers DHT levels in the body. Reduced DHT equates to less harm to hair follicles, which helps to slow or even stop the progression of hair loss in …