Nutrition for Anxiety
6 Evidence-Based Ways to Support a Calmer Nervous System
If you live with anxiety, you've probably noticed that some days your symptoms feel worse than others. While nutrition is not a replacement for professional mental health support, research suggests that what we eat can influence factors that affect our mood, energy levels and stress response.
Anxiety is complex and rarely has a single cause. However, nutrition can play an important role in supporting overall wellbeing and helping to create the conditions for a more calm and resilient nervous system. If the body is out of balance and detects any internal ‘threats’ then it can sound the alarm system or stress response. This is before we have to deal with anything in the environment! So creating a balanced and supported body, we give ourselves a solid foundation for resilience and managing whatever may come our way.
Here are six evidence-based ways nutrition may help support anxiety management.
1. Keep Blood Sugar Levels Stable
Many people are surprised to learn that blood sugar fluctuations can sometimes trigger symptoms that feel very similar to anxiety.
When blood sugar drops too low, the body responds by releasing stress hormones such as adrenaline and cortisol. This is designed to help raise blood sugar levels quickly, but it can also produce symptoms including:
Shakiness
Heart palpitations
Sweating
Irritability
Difficulty concentrating
Feeling "on edge"
For some people, these symptoms can feel almost identical to anxiety.
Supporting stable blood sugar levels may help reduce unnecessary physiological stress on the body.
Practical tips include:
Eating regular meals throughout the day
Including protein with each meal
Choosing high-fibre carbohydrates
Avoiding long periods without eating
Reducing reliance on sugary snacks and drinks
A balanced breakfast that contains protein, healthy fats and fibre can be particularly helpful for maintaining steady energy throughout the morning.
2. Nourish a Dysregulated Nervous System
Modern life places many demands on our nervous system. Chronic stress, poor sleep, excessive caffeine intake and skipping meals can all contribute to a heightened state of alertness.
When the body perceives ongoing stress, it may remain in a "fight or flight" state for longer periods of time. This can make it harder to relax, switch off and feel emotionally resilient.
Nutrition cannot eliminate stress, but it can help support the body's ability to cope with it.
Helpful habits include:
Eating enough throughout the day
Prioritising protein-rich meals
Staying hydrated
Limiting excessive alcohol intake
Supporting healthy sleep patterns
Think of nutrition as providing the raw materials your body needs to function effectively, particularly during periods of increased stress.
3. Follow a Mediterranean-Style Eating Pattern
Rather than focusing on individual superfoods or supplements, research increasingly points towards the benefits of overall dietary patterns.
The Mediterranean diet is one of the most well-researched eating patterns for both physical and mental health.
It typically includes:
Vegetables
Fruit
Legumes
Whole grains
Nuts and seeds
Olive oil
Fish and seafood
Moderate amounts of dairy
Limited ultra-processed foods
Studies have found that people who follow higher-quality dietary patterns tend to report better mental wellbeing and lower levels of anxiety and depression.
While no single food can prevent anxiety, a nutrient-rich dietary pattern may help support overall brain and nervous system health.
4. Support the Gut-Brain Connection
The gut and brain are constantly communicating through what researchers call the gut-brain axis.
Our gut contains trillions of microorganisms that influence digestion, immune function and the production of various compounds involved in mood regulation.
While research in this area is still developing, evidence suggests that supporting gut health may play a role in mental wellbeing.
Simple ways to support a healthy gut include:
Eating a wide variety of plant foods
Increasing fibre intake gradually
Including fermented foods such as yoghurt, kefir or sauerkraut if tolerated
Reducing excessive intake of ultra-processed foods
A diverse and fibre-rich diet appears to be one of the most effective ways to support a healthy gut microbiome.
5. Include Omega-3 Rich Foods
Omega-3 fats are important structural components of the brain and play a role in regulating inflammation and cell signalling.
Research has suggested that omega-3 fatty acids may help support mental wellbeing and may have a beneficial effect on anxiety symptoms in some individuals.
Good food sources include:
Salmon
Sardines
Mackerel
Herring
Trout
Aim to include oily fish two to three times per week where possible.
For those who do not eat fish, plant sources such as walnuts, chia seeds and flaxseeds can still contribute beneficial fats to the diet.
6. Consider Your Caffeine Intake
Many people rely on caffeine to get through the day, but it can sometimes worsen feelings of anxiety.
Caffeine stimulates the nervous system and can increase:
Heart rate
Alertness
Adrenaline release
Feelings of jitteriness
People who are prone to anxiety may be particularly sensitive to these effects.
If you regularly experience nervousness, racing thoughts or palpitations, it may be worth experimenting with:
Reducing total caffeine intake
Switching some coffees to decaffeinated options
Avoiding caffeine later in the day
Small changes can sometimes make a noticeable difference.
Bringing It All Together
Anxiety is influenced by many factors, including genetics, life experiences, sleep, stress, relationships and overall health.
Nutrition is not a cure for anxiety, but it can provide meaningful support for a healthier and more resilient nervous system.
Focus on the basics:
Eat regular balanced meals
Support stable blood sugar levels
Prioritise whole foods
Include omega-3-rich foods
Support gut health
Be mindful of caffeine intake
Small, sustainable changes are often more powerful than striving for perfection.
If anxiety is having a significant impact on your daily life, it is important to seek support from an appropriate healthcare professional.
