5 things you can do today to help protect your future brain health

Our brains change throughout our lives. While ageing is inevitable, how we age is influenced by many factors, including the choices we make every day.

Although there’s no guaranteed way to prevent neurological disease or dementia, a growing body of research suggests that healthy lifestyle habits can support brain health across the lifespan. The same habits that benefit your heart, muscles and metabolism also help support a healthy brain.

Here are five evidence-based habits worth investing in.

1. Move your body

Regular physical activity is one of the most effective ways to support brain health. Exercise improves blood flow to the brain, stimulates brain-derived neurotrophic factor (BDNF) – a protein involved in learning and memory, and supports the formation of new neural connections.

Physical activity also reduces inflammation, supports cardiovascular health and helps preserve muscle as we age. We now know that healthy muscles communicate with the brain through signalling molecules that influence metabolism and healthy ageing, highlighting just how interconnected our bodies really are.

Aim for a combination of aerobic exercise and resistance training each week. The best exercise is the one you enjoy enough to keep doing.

2. Stay socially connected

Meaningful social connection is good for brain health.

Regular interaction challenges memory, language and emotional processing, while strong social relationships have consistently been associated with healthier cognitive ageing.

Connection also gives us something less tangible, but equally important – a sense of belonging and purpose. Whether that’s through work, volunteering, learning, friendships or your local community, having meaningful reasons to engage with the world has been associated with healthier ageing and improved wellbeing.

3. Eat like a Mediterranean

When it comes to nutrition, the Mediterranean diet remains one of the best-studied dietary patterns for brain health.

A diet rich in vegetables, fruit, legumes, whole grains, nuts, fish and extra virgin olive oil provides healthy fats, fibre and antioxidants that support healthy blood vessels and help reduce inflammation.

Researchers are also increasingly interested in mitochondria – the tiny energy-producing structures within our cells. Healthy mitochondria help power every thought, movement and nerve signal, and emerging evidence suggests that healthy dietary patterns may help support their function over time.

Rather than focusing on individual “superfoods”, think about the overall pattern of how you eat.

4. Sleep like you mean it

Sleep is one of the brain’s most important restorative processes.

During deep sleep, memories are consolidated and the brain’s glymphatic system becomes more active, helping clear metabolic waste products that accumulate during waking hours. Sleep also supports learning, emotional regulation, immune function and cellular repair.

Aim for 7–9 hours of quality sleep each night, maintain a regular sleep schedule and try to get outside for natural morning sunlight soon after waking. Morning light helps regulate your circadian rhythm – your body’s internal clock – which influences sleep, metabolism and daytime alertness.

5. Stress less

Stress is part of life, but chronic stress can have lasting effects on both the brain and body. Persistently elevated stress hormones have been linked to impaired memory, reduced concentration, inflammation and accelerated biological ageing, including processes such as cellular senescence (when cells permanently stop dividing but do not die).

When we’re overwhelmed it’s easy to reach for quick fixes like alcohol, smoking or endless doom scrolling, but these rarely reduce stress in the long term.

Developing healthy ways to recover from stress, and where possible reducing ongoing sources of chronic stress, is an important part of protecting long-term brain health.

The bottom line

There is no single supplement or “brain hack” that protects the brain.

Brain health is built through everyday habits. Move regularly. Eat well. Prioritise sleep. Stay connected. Manage stress. Avoid smoking, keep alcohol to a minimum and remember that looking after your brain ultimately means looking after your whole body.

The earlier these habits become part of daily life, the greater the opportunity to support healthy brain ageing in the years ahead.

About Dr Lysandra Katelaris

Neurologist, Neurology Castle Hill
MBBS (Hons) Bsc (Med) FRACP
Dr Lysandra Katelaris is an adult neurologist and diagnostic neurophysiologist, specialising in headaches, neuromuscular disorders, peripheral nerve disorders, epilepsy, and neuroimmunology, including multiple sclerosis. She trained at UNSW, earning a Bachelor of Medicine, Bachelor of Surgery, and an Honours degree in Medical Science, and completed her Neurology Fellowship at Westmead Hospital. She is also skilled in administering Botulinum toxin injections for conditions like migraines, hyperhidrosis, and spasticity.