Stress: the hidden driver of ageing (and 5 things you can do about it)

When we think about our health, we often focus on the visible things, our weight, our heart, our muscles, or what we eat. But quietly working behind the scenes, influencing all of these, is something far less visible, yet incredibly powerful. That is stress.

Most of us think of stress as a feeling, pressure, worry, being overwhelmed. But in reality, stress is not just in the mind. It is a whole-body response, affecting almost every system we have, from our muscles and heart, to our metabolism, immunity, and even how our brain functions.

In small amounts, stress is not only normal, it’s actually quite helpful. It sharpens focus, increases alertness, and prepares us to deal with challenges. This is the classic “fight or flight” response, something that has helped humans survive for thousands of years. So, the problem is not stress itself. The problem is when stress never switches off.

How chronic stress impacts your health

Modern life rarely gives us true recovery. Emails, responsibilities, financial pressures, poor sleep, and constant stimulation mean that many people live in a state of low-level stress for much of the day. And over time, this can begin to take a toll.

You might notice it first as tiredness, poor sleep, or feeling on edge. But underneath that, something more significant is happening.

Chronic stress keeps levels of cortisol, our main stress hormone, elevated. This affects how we regulate blood sugar, how we store fat, and even how our brain functions. It can drive unhealthy inflammation, impact our immune system, and contribute to long-term conditions such as heart disease and type 2 diabetes as we age.

Over time, constant stress can also accelerate the ageing process itself. Prolonged elevations in cortisol drive oxidative stress and inflammation, impair cellular repair, and may even shorten telomeres, the protective caps on our chromosomes linked to biological ageing.

Stress also affects how we think. The brain becomes more reactive, less able to switch off, and over time this can lead to what many people describe as “brain fog”, difficulty concentrating, forgetfulness, and reduced mental clarity. So while stress may feel like something temporary, its effects can be long-lasting if left unmanaged.

The good news: we can build resilience to stress

We can’t realistically remove stress from our lives, but we can change how we respond to it. Stress resilience is not something we’re born with – it’s something we can build, through the small choices we make every day. And the good news is that these changes don’t need to be dramatic.

1. Move more often
One of the most effective ways to reduce stress is also one of the simplest. Just move a little more. A brisk walk, a short cycle, even ten minutes outside can make a noticeable difference. Movement helps regulate stress hormones and supports brain chemistry, improving both mood and mental clarity.

2. Prioritise your sleep
Sleep is often the first thing to suffer when we are stressed, but it’s one of the most powerful tools for recovery. Poor sleep increases stress, and stress disrupts sleep. Breaking that cycle, even with small steps such as a consistent bedtime or reducing screen use in the evening, can have a profound effect on how you feel.

3. Nourish your body 
Under stress, we often reach for quick, high-fat, sugary foods. Stress eating may be caused by elevated levels of cortisol, and other factors. Over time, it can worsen energy levels and mood, as well as impacting weight. 

A balanced intake of nutrients, particularly vitamins and minerals involved in energy production, better supports the body’s ability to cope with stress. 

This becomes particularly important after 50, when our nutrient requirements change and our ability to absorb them becomes less efficient. We know from diet and nutrition data that most older adults are insufficient in many essential vitamins and minerals.

4. Stay connected
We’re not designed to deal with everything on our own. We evolved to be social.
A simple conversation, sharing a problem, or spending time with others can reduce stress more than we often expect. Social connection is not just good for emotional wellbeing, it’s also linked to better long-term health and resilience.

5. Go easy on yourself
Sometimes the biggest source of stress is not what’s happening around us, but the pressure we place on ourselves. Trying to do everything perfectly, all of the time, is exhausting. And it’s not possible either.

Learning to step back and ask, “What actually matters here?” can be one of the most powerful ways to reduce stress.

Stress won’t define your health if you allow your body time to recover. Small daily actions like moving a little more, sleeping a little better, eating more consciously, and connecting with others, all help to bring the body back into balance. Over time, those small actions add up to a big difference. 

We’ll never eliminate stress from our lives – nor should we, as it can be helpful from time to time. But we can build the resilience to live well, despite it.

Dr Max Gowland, PhD, is the founder of Prime Fifty.