Why am I suddenly ageing so fast?

If you feel like you’ve been hit by a sudden burst of ageing, you’re not alone. Many people experience this apparent ‘overnight’ ageing, noticing changes to their skin, joints, muscles or energy levels, or a more general sense that their body just feels different.

For women, fluctuating hormone levels due to the menopause transition can play a part in this – but they’re not the main cause. Research has now shown that biological ageing, based on molecular changes around our bodies, really does dramatically accelerate at certain times in our lives, most notably around our mid-40s and early 60s.

Below, we’ll look in detail at one of the studies that uncovered this, including how these bursts of ageing might lead to visible signs such as changes to your skin, as well as other effects that could impact your wider health. We’ll also highlight things you can do to slow your biological and skin ageing.

Can you really age overnight?

We traditionally think of ageing as a gradual, linear process. But the latest scientific evidence paints a different picture.

A study published in 2024 by researchers from the highly respected Stanford University School of Medicine in California found that dramatic bursts of ageing take place around our mid-40s and early 60s.

Ageing is associated with changes to both the molecular and bacterial make up of your body. The numbers of different types of molecules go up or down as you age, while the balance of microbes living in your gut, mouth, nose or on your skin changes.

While these changes happen gradually for the majority of your life, it turns out they are much more pronounced at certain times.

The Stanford study followed 108 women and men aged 25 to 75 over several years, taking blood and stool samples, and skin, mouth and nose swabs, every 3 to 6 months. Researchers used the samples to chart the changing numbers of more than 135,000 different types of molecules and microbes linked to ageing.

They found that over 80% of these did not increase or decline steadily but rose or fell drastically at certain ages, with the most pronounced changes taking place during the mid-40s and early 60s.

While these increased rates of change may last for several years, the study suggests that the initial ‘turning points’ can be relatively sudden. This could help to explain why many people feel they have aged ‘overnight’.

Along with these overall changes grouped around the mid-40s and early 60s, researchers also found a marked reduction in the body’s ability to repair DNA, the building blocks of our genes, between the ages of 50 and 56. DNA repair is essential for maintaining the health of your cells and tissues.

Sudden skin ageing

Changes to the health and condition of your skin, especially on exposed areas like your face and hands, are among the most visible signs of ageing. If you feel like you’ve aged suddenly, it may be because of skin changes, such as wrinkles, sagging and ‘age spots’ – areas of darker pigmentation.

The Stanford study found that biological changes linked to skin ageing significantly accelerated in both the mid-40s and early 60s.

This included changes to levels of collagen and elastin, which give skin its structure and elasticity, and sugars called glycosaminoglycans, which help skin to retain moisture. Cell damage (cytolysis), which can increase water loss, also sped up.

The study showed that loss of muscle mass due to ageing underwent more rapid shifts in both the mid-40s and early 60s too. Muscle helps to support your skin so less muscle can increase skin sagging or looseness.

The good news is, there are plenty of things you can do to help slow down visible skin ageing. We’ll look at some of these towards the end of this article.

Other effects of sudden ageing

Of course, ageing isn’t just about the visible signs. The Stanford study found that a number of changes related to biological functions and potential health conditions also accelerated at the same two life stages.

Areas prone to accelerated ageing in the mid-40s included:

• metabolism of fats
• metabolism of alcohol
• metabolism of caffeine
• risk of cardiovascular disease

Areas prone to accelerated ageing in the early 60s included:

• immune system function
• kidney function
• metabolism of carbohydrates and caffeine
• risk of cardiovascular disease
• factors related to risk of type 2 diabetes

The researchers did note that some of these factors could be driven by lifestyle changes as well as biological factors. For instance, your early 40s can be a busy and stressful period for many people. This could lead to you drinking more, causing damage that makes your body less efficient at processing alcohol, as well as doing less physical exercise, which could affect a range of health markers

Reducing the health impacts of ageing

Just as negative lifestyle changes can contribute to biological ageing, so positive changes can reduce the impact ageing has on your health. It may not come as a surprise that two areas in particular where you can make a difference are exercise and diet.

Exercise

Taking regular exercise can significantly reduce your risk of developing conditions like cardiovascular disease and type 2 diabetes, boost your immune system, slow the decline in kidney function and improve your overall metabolic health as you age.

A major 2026 study found that older adults who took up exercising at least three times a week improved 19 out of 20 markers linked to metabolic health. The results suggest that a combination of aerobic exercise – like walking, swimming or cycling – and resistance training, such as lifting weights, bodyweight exercises or using resistance bands, provide the biggest range of benefits.  

Nutrition

Scientists believe that switching to a healthy eating pattern like the Mediterranean diet can slow down many biological processes linked to ageing, reducing the risk of conditions like cardiovascular disease and dementia and increasing your healthy lifespan.

Following the Mediterranean diet means eating a wide range of multi-coloured vegetables and fruits, nuts and seeds, and wholegrains.

Focus on healthy protein sources like beans, pulses, fish and tofu, and perhaps some chicken and lean meat. Swap saturated fats like butter for extra virgin olive oil, and refined carbohydrates like white bread, pasta and rice for wholegrain versions. Also make sure to limit or cut out processed foods like packaged snacks and sugary drinks.

Does menopause cause sudden ageing?

The menopause transition consists of three main phases. Perimenopause is the years leading up to menopause. Menopause is the single point in time 12 months after your last period. And post-menopause is everything beyond that.

Many menopause symptoms are most pronounced during perimenopause, when levels of protective hormones like oestrogen are fluctuating widely. This can cause a wide variety of changes, many of which could make you feel suddenly older, such as joint and muscle pain, low energy, fatigue and dry skin.

Although the timings of the menopause transition vary from person to person, on average perimenopause begins in the mid-40s, meaning it coincides with the first phase of accelerated ageing identified by the Stanford study.

However, the researchers found that the same rapid ageing was happening to men as well as women in their mid-40s, concluding that there were other more significant factors at play.

That’s not to say that menopause doesn’t contribute to increased ageing. A long-term, large-scale series of studies measured changes in the biological age of women's blood cells, seen as a potential mirror for ageing in other parts of the body.

The results showed that menopause accelerated cellular ageing by an average of 6%, meaning that the earlier a woman begins the menopause transition, the more of an impact it could have on her biological age over the course of her life.

The researchers used the example of a woman who begins perimenopause early, at the age of 42. Eight years later, when she reaches the age of 50, she will be a whole year older biologically than another 50-year-old woman who began the menopause transition at 50.

These changes are more gradual than the age-related changes seen across both women and men in their mid-40s so are unlikely to be the main factor causing apparent ‘overnight’ ageing. Nevertheless, they could add to the feeling of getting older suddenly, especially alongside common menopause symptoms.

Probiotics for menopause symptoms

Probiotics are friendly bacteria that can help to improve the balance of your gut microbiome. That includes your estrobolome, the part that processes and redistributes oestrogen. This can lead to health benefits all around your body.

The Better Gut probiotic formula contains six strains of bacteria shown in studies to improve menopause symptoms.

Together, they can help to:

• increase energy
• improve sleep quality
• reduce hot flushes
• reduce bloating
• boost gut function
• improve vaginal health

How to slow visible skin ageing

Changes to your skin are the most visible signs of ageing and perhaps the most likely to make you feel that you’ve aged suddenly. While you can’t stop your skin from ageing, there are things you can do to slow the process down and help your skin to look healthier.

• Use sunscreen: Sun damage, also known as photoageing, is the biggest cause of visible facial signs of ageing, especially for people with lighter skin. Studies have shown that a sunscreen spray or cream with a sun protection factor (SPF) of at least 30 can reduce the effects of photoageing.
• Stop smoking: Smoking is extremely damaging to your skin, increasing wrinkles and reducing elasticity, particularly in the middle and lower thirds of your face. The skin of smokers aged 40 can resemble that of non-smokers at 70. Stopping smoking can be hard but help is available.
• Use moisturising skin creams: Water loss from your skin increases as you age, and has a significant impact on its appearance. Daily moisturising creams help to plump the outer skin cells and restore their structure, reducing water loss.
• Take regular exercise: We’ve discussed the overall health benefits of exercise above but it can also improve the look and health of your skin by boosting blood circulation, skin cell metabolism and the production of anti-inflammatory compounds.
• Eat a healthy diet: The same goes for good nutrition – it can improve both your general and skin health. Following a wholefood, plant-based eating pattern like the Mediterranean diet provides your skin with protective antioxidants and prevents cell damage, slowing down the signs of ageing.
• Try hormone replacement therapy (HRT): The loss of protective hormones like oestrogen and progesterone during the menopause transition can increase skin ageing. A review of multiple clinical studies found that HRT improved skin elasticity and collagen content, reducing wrinkles. 

Summary

Research shows that biological ageing accelerates at two specific life stages – around your mid-40s and early 60s.

During these periods, a wide range of biological markers related to ageing change much more rapidly than at other times, potentially affecting skin health and metabolism and increasing the risk of developing long-term health conditions like cardiovascular disease and type 2 diabetes.

Going through the menopause transition also accelerates ageing but in a more gradual way. However, certain menopause symptoms may add to the feeling of sudden ageing.

Exercising at least three times a week and switching to a balanced, plant-focused diet can help to slow the overall effects of ageing on your health.

Along with exercise and improved nutrition, using sunscreen and moisturising creams and quitting smoking can slow skin ageing. For women going through the menopause transition, HRT may also help.