Small, everyday choices add up – you can’t guarantee a healthy brain or fully protect against age-related conditions but the right diet and lifestyle choices can help you perform at your best.
Too much caffeine
Moderate caffeine can have cognitive benefits but too much may trigger anxiety, restlessness and sleep disruption, all of which can affect mental wellbeing and next-day functioning. Sensitivity varies because people metabolise caffeine differently.
How to beat it
• If you notice jitters, mood swings or sleep issues, gradually reduce intake and avoid it later in the day
• Swap some drinks for low-caffeine options, such as green tea
• Track when you’re using it as a quick fix for tiredness, then remedy the root cause (hydration, sleep routine, eating habits)
Over-consuming energy drinks
These commonly contain caffeine, meaning regular consumption is likely to increase blood pressure and heart rate – as well as potentially cause nervousness, agitation, insomnia or mood swings. Some products are also high in sugar, which can lead to energy crashes and headaches.
How to beat it
• If you do use energy drinks, avoid frequent use and binge consumption, and don’t mix them with alcohol
• Reduce your caffeine intake from other sources on the days when you do have an energy drink
• Focus on the basics – like hydration, balanced diet and adequate sleep – so you’re less reliant on stimulants
Relying on UPFs
Diets high in ultra-processed foods are linked with poorer mental wellbeing and cognitive outcomes over time. Packaged snacks, sugary cereals and ready meals can contain additives and oils that may negatively affect gut health, and therefore impact brain function and mood via the gut-brain axis. This is more about patterns and reliance than the occasional convenience meal, though.
How to beat it
• Aim for a baseline of whole foods on most days and view convenience foods as an add-on, rather than the foundation
• Build meals around fruit and vegetables, wholegrains, beans and pulses to increase protective nutrients and fibre
• If you buy convenience foods, read labels to compare ingredients and choose those that better support your overall diet
Skipping meals
This can lead to low blood sugar, meaning your energy-hungry brain becomes starved of fuel. Irregular eating patterns are also likely to cause blood sugar fluctuations that can affect your concentration and cognitive function.
How to beat it
• Plan your meals ahead so you’re less likely to miss them after a busy day
• If you need snacks, choose balanced options that include protein, healthy fats and fibre to help sustain your energy between meals
• If breakfast is difficult, consider eating intuitively: tune in to your hunger cues rather than enforcing a rigid rule
Frequent alcohol consumption
Alcohol can act as a depressant and regular or excessive intake can disrupt your neurotransmitters, impair emotional stability and worsen sleep. While it may give you a short-lived mood boost, regular use can disrupt serotonin and dopamine balance over time, contributing to increased anxiety and low mood after the effects wear off.
How to beat it
• If you’re worried about your drinking, speak to your GP for support, including referral to counselling services
• Use Drinkaware’s tools for structured, practical help (drinkaware.co.uk)
• Prioritise sleep-supportive routines and alternative ways to decompress without alcohol
Irregular sleep routine
Inadequate sleep is linked with poorer focus and concentration, and there’s evidence connecting sleep quantity and quality with depression and other health problems. Poor sleep may also disrupt cortisol and blood glucose levels, potentially increasing your cravings for sugar or carbs and leading to greater caffeine use the next day.
How to beat it
• Keep an eye on your sugar intake, reduce caffeine intake gradually and try eating your evening meal a little earlier
• If you feel tired all the time, use that as a prompt to review your daily habits (sleep timing, caffeine, diet) rather than simply pushing through
Letting stress take over
Chronic stress can increase cortisol, which may shrink the hippocampus (the brain’s memory centre) over time. Stress can also be a contributor to brain fog.
How to beat it
• Try stress-regulation habits, such as deep breathing exercises, mindfulness or meditation, as well as spending time in nature
• Build in movement you can stick to (such as aerobic activity, strength training or yoga) – physical activity is linked with brain-supportive blood flow and stress reduction
• If your stress feels relentless, consider seeking support and speaking with a healthcare professional about what you’re experiencing
Screen time before bed
Blue light can impair melatonin production. The act of scrolling itself can also be stimulating because the brain interprets it as a daytime activity. Over time this can work against sleep quality, focus, concentration and your broader health.
How to beat it
• Put your phone away at least 30 minutes before bed
• Replace scrolling with a wind-down routine that signals nighttime (quiet, low-stimulation habits)
Read more:
How to sleep better
Eat well for… gut health
8 ways poor sleep wrecks your healthy eating intentions
Risk factors for high cholesterol
What to eat to beat common health problems
All health content on goodfood.com is provided for general information only, and should not be treated as a substitute for the medical advice of your own doctor or any other health care professional. If you have any concerns about your general health, you should contact your local health care provider. See our website terms and conditions for more information.