This post is a general wellness guide, not medical advice. If you suspect you have a cortisol-related condition or are experiencing symptoms that concern you, please speak with your doctor — some of what's listed here can have medical causes that need proper testing and treatment.
Cortisol gets talked about a lot, but usually just as 'the stress hormone' — like it's inherently bad. It's not. Cortisol is essential. It regulates your energy, helps you wake up in the morning, and supports your immune response. The issue is when it stays elevated for too long, because that's when it starts to mess with everything else.
Here's what I've found helpful to understand: chronically high cortisol isn't always caused by what we'd label as 'stress.' It can be driven by things we do every single day without thinking — like skipping breakfast or reaching for coffee the second we wake up. So let's break it all down.
Signs your cortisol might be running high
These signs don't confirm a diagnosis — only a doctor can do that. But if several of these feel familiar, it might be worth paying attention to how your daily habits are affecting your stress response.
| Sign | What it might feel like |
|---|---|
| Difficulty concentrating | Brain fog, losing your train of thought, struggling to focus |
| High blood pressure | Something to check with your GP if you haven't recently |
| Gut issues | Bloating, irregular digestion, a gut that feels reactive |
| Sleep problems | Wired but tired at night, waking between 2–4am |
| Reduced sex drive | Low libido that doesn't have an obvious explanation |
| Muscle weakness | Feeling physically depleted even when you haven't done much |
| Weight gain in face, midsection & upper back | Changes in where your body stores fat |
| Flushed face | Looking or feeling flushed without obvious cause |
| Sugar cravings | Reaching for something sweet, especially mid-afternoon |
| Energy slumps | Crashes that hit hard, usually after meals or in the afternoon |
What's actually pushing cortisol up
Some of these will surprise you. It's not just emotional stress — your body reads physical signals too, and several common habits send it into a stress response without you realising.
| Factor | Why it matters |
|---|---|
| Not eating enough | Under-fuelling is a physical stressor your body responds to immediately |
| Skipping meals | Gaps without food can spike cortisol as the body tries to regulate blood sugar |
| Caffeine on an empty stomach | Coffee before food drives a cortisol spike first thing in the morning |
| Over-exercising | Too much high-intensity movement without recovery keeps cortisol elevated |
| Lack of movement | Equally, not moving enough means cortisol has no healthy outlet |
| Dehydration | Even mild dehydration is read by the body as a stressor |
| Nutrient deficiency | Low magnesium, vitamin C, and omega 3 are particularly linked to cortisol regulation |
| Smoking and alcohol | Both disrupt the body's stress response systems |
| Medical conditions | Some conditions directly affect cortisol — worth ruling out with your doctor |
Drinking coffee the moment you wake up — before eating anything — is one of the most common cortisol-spiking habits. Your cortisol is already naturally elevated in the first hour after waking (that's normal and healthy). Adding caffeine on an empty stomach amplifies that spike. Try eating something first, even something small.
What actually brings cortisol down
The good news is that a lot of what supports a calmer stress response is genuinely accessible — it doesn't require an expensive supplement stack or a complete life overhaul.
Beyond food, the lifestyle factors matter enormously. Probiotics support the gut-brain axis, which plays a role in how your body handles stress. Magnesium is one of the most commonly depleted minerals and is deeply involved in cortisol regulation. Omega 3s, found in oily fish and flaxseed, have an anti-inflammatory effect that supports the stress response too.
Then there's the less 'wellness-y' stuff that actually works: regular movement (not excessive), adequate sleep, time outside in nature, mindfulness or journaling, and social connection. These aren't filler advice — they genuinely signal safety to your nervous system, which is exactly what it needs to stop producing cortisol at high levels.
More exercise is always better for stress.
Over-exercising is actually one of the factors that keeps cortisol chronically elevated. Regular, moderate movement is supportive — daily high-intensity training without adequate recovery can work against you.
- Drinking coffee immediately after waking, before eating anything, which amplifies the morning cortisol spike
- Skipping meals or under-eating in an attempt to eat 'less', which the body reads as a stressor
- Over-exercising without recovery days, keeping the stress response permanently activated
- Ignoring dehydration — most of us are mildly dehydrated by mid-morning and don't connect it to how we feel
- Treating cortisol as purely a mental health issue and missing the physical habits that drive it up daily
- Jumping to supplements before addressing the basics like sleep, food timing, and movement
One thing to try this week
If you do nothing else after reading this, try shifting your coffee later. Eat something first — even just a few bites — before your first cup of the day. It's a small change that directly reduces one of the most common cortisol spikes. Do that consistently for a week and notice whether your mid-morning energy and focus feel any different.