Cortisol is often labelled the stress hormone, but that doesn’t tell the whole story.
Produced by your adrenal glands, cortisol helps regulate blood sugar, blood pressure, inflammation, immunity and your body’s natural sleep–wake cycle. In healthy amounts, it is essential for life. The problem isn’t cortisol itself—it’s when modern life keeps it switched on for far too long.
As both a chef and clinical nutritionist, I’ve seen how chronic stress influences everything from digestive complaints and stubborn weight gain to poor sleep, fatigue and inflammation. The good news? Food, movement and daily habits can help restore balance.
What is cortisol?
- Produced by the adrenal glands
- Follows a natural circadian rhythm
- Highest in the morning
- Gradually declines throughout the day
- Rises temporarily during physical or emotional stress
Signs your cortisol may be out of balance
- Poor sleep
- Afternoon energy crashes
- Increased belly fat
- Sugar cravings
- Frequent illness
- Anxiety
- Brain fog
- Digestive issues
Lifestyle strategies
- Limiting excess caffeine and alcohol
- Morning sunlight
- Daily movement (without overtraining)
- Consistent sleep
- Time in nature
- Mindful breathing
- Reducing ultra-processed foods
How nutrition supports healthy cortisol
Rather than trying to “lower cortisol”, my approach is to nourish the body so it becomes more resilient to stress. Food is information. Every meal is an opportunity to calm inflammation, support the nervous system and help the body return to balance. Include:
| Food | Key Nutrients | How it Helps |
|---|---|---|
| 🥚 Eggs | Protein, choline, B vitamins | Stabilises blood sugar and supports adrenal health, especially at breakfast. |
| 🐟 Salmon, sardines & mackerel | Omega-3 fats, vitamin D | Helps reduce inflammation and supports a balanced stress response. |
| 🥬 Dark leafy greens | Magnesium, folate | Magnesium supports muscle relaxation and healthy nervous system function. |
| 🫐 Berries | Vitamin C, polyphenols | Powerful antioxidants that help protect cells during periods of stress. |
| 🥝 Kiwi & citrus | Vitamin C | The adrenal glands contain high concentrations of vitamin C, which is involved in cortisol production and recovery. |
| 🥑 Avocado | Healthy fats, potassium | Supports steady energy levels and helps regulate blood pressure. |
| 🫘 Lentils, chickpeas & beans | Fibre, plant protein, magnesium | Promote steady blood glucose and nourish beneficial gut bacteria. |
| 🥜 Nuts & seeds | Magnesium, zinc, healthy fats | Help regulate the nervous system and reduce oxidative stress. |
| 🥣 Oats | Slow-release carbohydrates, fibre | Provide sustained energy and support serotonin production. |
| 🥛 Greek yoghurt & kefir | Protein, probiotics | Supports gut health, which communicates directly with the brain via the gut-brain axis. |
| 🍫 Dark chocolate (70%+) | Flavanols, magnesium | May help improve mood and reduce perceived stress when enjoyed in moderation. |
| 🌿 Green tea | L-theanine | Promotes calm alertness without the jitters associated with excess caffeine. |
The Cortisol-Friendly Plate
Aim to include:
🥩 Protein → eggs, fish, tofu, legumes
🥬 Colourful vegetables → leafy greens, broccoli, capsicum
🥑 Healthy fats → olive oil, avocado, nuts, seeds
🌾 High-fibre carbohydrates → oats, quinoa, sweet potato, legumes
🫐 Antioxidant-rich foods → berries, herbs, spices, citrus
| More Often | Less Often |
|---|---|
| Whole foods | Ultra-processed foods |
| Water & herbal tea | Sugary drinks |
| Omega-3 rich fish | Deep-fried takeaway |
| Whole grains | Refined carbohydrates |
| Fermented foods | Excess alcohol |
| Nuts & seeds | Excess caffeine on an empty stomach |
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