The Effects of Stress on the Body — and What You Can Do About It

Last updated on May 17, 2026 at 10:54 pm

My best friend told me something that has stayed with me ever since. After her breast cancer diagnosis, as she was processing everything that had happened to her, she reflected back on the period that preceded it — a time of severe stress and grief following a painful job loss. She said she believed that what she went through during that time, the sustained psychological toll of it, may have contributed to the outbreak of her illness. She couldn’t prove it. But she felt it, deeply and clearly.

And then she told me: manage your stress, Manja. It’s not optional.

I think about that often. Because stress management is something I genuinely struggle with — and I think most honest people would say the same. Knowing that chronic stress is harmful and actually doing something about it are two very different things. Life doesn’t slow down to accommodate our need for calm. The pressures of work, family, health, and everything in between don’t pause because we know they’re damaging us.

But the research on stress and disease is serious enough that it deserves more than a passing acknowledgement. The link between sustained psychological stress and physical illness — including immune function, inflammation, metabolic disease, and yes, potentially cancer — is one of the most important and underappreciated areas of health science. It’s why stress management is not a soft lifestyle add-on. It is a medical priority.

This article explains what stress actually does to the body and mind, why chronic stress is so damaging, and — most practically — what nutrition and lifestyle choices can help buffer its effects.

What stress actually is — and when it becomes a problem

Stress is defined as any situation that disrupts the body’s homeostasis — its internal chemical balance. And not all stress is bad. The stress of physical exercise builds muscle. The stress of a challenging presentation sharpens focus. Short-term stress, followed by recovery, is how we grow and adapt.

The problem is chronic stress — when the body remains in a state of alert without adequate rest and recovery in between. At that point, the mechanisms designed to protect us start to work against us.

Physical stress

Physical stress refers to any external or internal stressor that affects the body directly. This can be acute — surgery, infection, injury — where the body mobilises all its energy reserves toward healing, leaving nothing for growth and repair. Short-term, this is manageable. Long-term, the consequences are serious.

Environmental stressors are a particularly relevant category in modern life. These include UV exposure, smoking, consumption of processed and ultra-processed foods, a sedentary lifestyle, and contact with chemicals used as preservatives, pesticides, and other additives. Every one of these places the body under a low-level chronic stress load — and they compound each other.

This is one of the reasons I’ve made changes beyond just food in my own home — removing plastic containers, switching to glass for storage, filtering our water, replacing non-stick pans. It’s about reducing the total environmental stress load, not just one element of it.

Psychological stress

Psychological stress refers to non-physical triggers that disrupt our inner equilibrium — fear, grief, loss, uncertainty, sustained pressure, conflict. What makes psychological stress particularly insidious is that the body responds to it in exactly the same way it responds to physical danger. The stress hormones don’t distinguish between a lion in the room and a devastating piece of news.

My friend’s experience — the grief and loss of her job, the identity disruption that came with it, the sustained period of emotional and psychological strain — is a version of this that many people will recognise. We now understand that prolonged psychological stress doesn’t just affect how we feel. It changes our biology.

What chronic stress does to the body

When the body perceives a threat — physical or psychological — it produces stress hormones: primarily cortisol and adrenaline. These hormones push the body into survival mode. Blood is redirected from internal organs to the muscles. Heart rate and breathing increase. Digestion slows or stops. The immune system is temporarily suppressed. Pupils dilate.

This is the fight-or-flight response — a beautifully designed emergency system. The problem is that it was designed for short-term emergencies, not sustained, low-level, months-long psychological strain. When stress hormones remain elevated over time, the effects throughout the body are significant:

• Weight gain — particularly around the abdomen. Cortisol promotes fat storage, increases appetite, and drives cravings for high-calorie foods. Read more: Obesity: Causes, Consequences & How Whole Foods Help
• Cardiovascular disease — chronic stress raises blood pressure, promotes inflammation, and damages arterial walls over time. Read more: Nutrition and Heart Disease
• Osteoporosis — elevated cortisol interferes with bone density over time
• Type 2 diabetes — stress hormones raise blood sugar and promote insulin resistance. Read more: Plant-Based Diet and Diabetes
• Metabolic syndrome — chronic stress is considered a significant factor in the development of metabolic syndrome, which encompasses obesity, hypertension, diabetes, and heart disease together. [1]
• Inflammatory conditions — stress is a well-documented trigger for flare-ups of conditions like psoriasis, Crohn’s disease, and multiple sclerosis
• Cancer — the relationship between chronic stress and cancer is complex and still being researched, but evidence suggests that sustained stress may create conditions that promote tumour development and growth. [2] Read more: Plant-Based Diet and Cancer

Oxidative stress — the cellular mechanism

When the body is in sustained stress mode, it has no energy for normal cellular repair and waste removal. Cells accumulate free radicals and metabolic debris — a state known as oxidative stress. Cells in oxidative stress send distress signals to neighbouring cells and to the immune system, triggering the inflammatory cascade. This is how chronic stress translates into chronic, systemic inflammation — and chronic inflammation is the underlying driver of most of the serious diseases we see in modern populations.

What chronic stress does to the mind

Short-term psychological stress sharpens us — it increases alertness and performance. But when stress becomes chronic, the mind begins to fracture under the sustained load.

Sleep becomes increasingly difficult as the mind remains hyper-alert and unable to slow down. Poor sleep then compounds the stress, creating irritability, impaired judgement, and emotional dysregulation. The threshold for negative reactions drops — things that would normally feel manageable begin to feel overwhelming.

Research has shown that chronic stress can physically change the structure of the brain — shrinking the regions responsible for complex thinking and executive function while activating the more primitive survival-focused areas. [3]

Over time, chronic psychological stress can lead to burnout, depression, anxiety disorders, and in some cases substance use as a coping mechanism — which brings its own cascade of consequences.

I say all of this not to be alarming, but to make the case that stress management is not a luxury or a wellness trend. It is one of the most important things any of us can do for our long-term health. My friend understood this viscerally. I am still learning to act on it consistently — and I suspect most people reading this are somewhere on that same journey.

What actually helps — nutrition and lifestyle approaches

Stress is an inevitable part of life. The goal is not to eliminate it but to build a body and a lifestyle that can absorb and recover from it more effectively. Here’s what the evidence supports:

Food as an anti-stress tool

Load up on antioxidant-rich whole foods. A plant-based diet is high in antioxidants — compounds that act as anti-inflammatory agents in the body and can lower oxidative stress directly. Colourful vegetables, berries, leafy greens, and fruits should be the foundation of every meal. The more variety and colour, the broader the antioxidant coverage.

Prioritise anti-inflammatory foods. Walnuts, chia seeds, flaxseed, and olive oil are rich in omega-3 fatty acids that actively reduce inflammation. Read more about plant-based omega-3 sources here. Turmeric, ginger, and green tea all have well-documented anti-inflammatory properties that are worth building into daily habits. [12]

Reduce stimulants. When the body is already in a stimulated state from stress hormones, adding caffeine can amplify anxiety and disrupt sleep further. I’m not suggesting eliminating coffee entirely — I drink it myself — but being mindful of the quantity and timing matters. Heavy caffeine consumption has been associated with increased stress, anxiety, and depression. [10]

Stay well hydrated. The body uses water to eliminate toxins and metabolic waste products — the very things that accumulate under stress. Adequate hydration supports this clearing process.

Reduce inflammatory foods. Refined sugar, white carbohydrates, processed meats, junk food, and excess alcohol all promote systemic inflammation — which compounds the inflammatory effects of chronic stress. [9] [11] These are worth reducing not just for general health but specifically as a stress management strategy.

Try intermittent fasting. Research shows that intermittent fasting can meaningfully decrease inflammation levels in the body. [4] I practise this myself around three times a week — I find it genuinely resets how I feel, both physically and mentally. Read more: Intermittent Fasting and Weight Loss

Lifestyle approaches that work

Movement. Physical exercise is one of the most effective stress management tools available. It directly reduces cortisol, produces endorphins, and improves sleep quality. It doesn’t need to be intense — a 30-minute walk does measurable good. I train at the gym regularly, and on the days I do, I genuinely feel the difference in my stress levels.

Meditation and breathwork. The goal of meditation is to help you observe and create distance from your own thought patterns and reactions — to interrupt the stress cycle rather than being carried along by it. Even 10 minutes a day has documented effects on cortisol levels and inflammatory markers.

Yoga and relaxation practices. Physical movement combined with breath awareness and deliberate relaxation directly counteracts the physiological stress response.

Sleep. Sleep is when the body repairs itself — it is not negotiable. Chronic sleep deprivation is both a cause and a consequence of chronic stress. Protecting sleep with consistent timing, a cool dark room, and reduced screen exposure before bed is one of the most impactful things you can do.

Reduce environmental stressors. Beyond food, consider the chemicals you interact with daily — in your cleaning products, your cookware, your food storage, your water. None of these changes need to happen overnight, but reducing the total environmental stress load your body carries is a meaningful part of the picture.

Connection. If your mental or physical health isn’t where it should be, please don’t carry it alone. Talk to the people around you. Seek professional support. Isolation amplifies stress; connection buffers it.

Nutrition guide for managing stress

A recipe for stressful days: Chamomile and Turmeric Golden Tea

This is a drink I genuinely make — particularly in the evenings when I want to wind down and give my body something calming and anti-inflammatory before sleep. It takes about 15 minutes and the ritual of making it is itself part of the value.

Why these ingredients work:

• Chamomile — has well-documented anxiolytic properties that ease psychological stress and calm the mind. High in antioxidants. [5]
• Turmeric — one of the most studied anti-inflammatory and antioxidant spices. Reduces oxidative stress directly. [6]
• Black pepper — activates the curcumin in turmeric, dramatically increasing how much your body can absorb. Just a pinch — you won’t taste it.
• Plant milk — I use my homemade macadamia coconut milk or almond milk. Warming and comforting without the inflammatory properties of commercial dairy.

Ingredients (serves 1):

• 1 cup (250ml) unsweetened plant milk — almond, oat, or macadamia coconut all work well
• 2 chamomile teabags or 2 tablespoons of loose leaf chamomile
• 1 teaspoon turmeric powder
• A pinch of black pepper
• Sweetener to taste — raw honey, maple syrup, or a few drops of stevia

How to make it:

1. Pour the plant milk into a small saucepan and add the chamomile — teabags or loose leaf.
2. Warm over low heat for 10 minutes, stirring regularly. Don’t let it boil — keep it at a gentle simmer.
3. In your mug, combine the turmeric, black pepper, and sweetener. Add a splash of the warm milk and mix into a smooth paste — this prevents lumps.
4. Remove the chamomile from the milk (discard teabags or strain out loose leaf).
5. Pour the remaining warm milk into your mug gradually, stirring as you go.
6. Taste and adjust sweetness. Drink warm.

This works beautifully before bed to promote sleep and relaxation, after meals to support digestion, or simply as a quiet moment in a busy day. Make two cups and share it with someone you love — the conversation that comes with it is probably the best stress management tool of all.

The bottom line

Chronic stress is not just an emotional experience — it is a physiological one with serious and well-documented consequences for the body. Managing it is not optional, and it goes far beyond telling yourself to “relax.”

The most effective approach combines several things working together: anti-inflammatory whole food eating, regular movement, adequate sleep, reduced environmental stressors, and genuine human connection. No single element is sufficient on its own. Together, they build a body and a life that is more resilient to the inevitable stresses that come.

I am still learning to do this consistently. I suspect you are too. The fact that we’re paying attention to it at all — that we’re taking it seriously as a health priority rather than a personality trait — is already meaningful progress.

My friend told me to manage my stress. I’m working on it. This article is part of that work — and I hope it helps with yours too.

If you want a structured programme to build anti-inflammatory eating habits — with meal plans, 200+ recipes, and a day-by-day approach — the Eat Healthier in 21 Days Challenge is built exactly for this.

The information in this article is for general educational purposes. If you are experiencing significant stress, burnout, depression, or anxiety, please seek support from a qualified mental health professional. Nutrition and lifestyle changes complement but do not replace professional mental health care.