Cortisol has been thrown around left, right, and centre over the last few years. You’ve probably heard it blamed for everything from belly fat to bad sleep, but do you actually know what it is, and what it’s doing in your body?
Cortisol is a steroid hormone made by your adrenal glands, two little glands that sit on top of your kidneys like tiny plump grapes. It’s often called the stress hormone because it’s released when your body thinks it’s in danger (real or imagined). It’s also part of your circadian rhythm, rising naturally in the morning to wake you up and slowly dropping throughout the day so you can rest at night.
Something we always have to remember is that cortisol is essential to life, you literally need it to survive. In short bursts, it’s amazing, as it mobilises energy, sharpens your brain, helps you respond to stress, and even dampens down inflammation. But the issue is overproduction, which is common nowadays as modern life has us pumping it out far more than nature ever intended.
Here are some of life’s essentials for cortisol:
When cortisol is balanced, you feel focused, calm, and energised. But if it stays too high for too long, it can start to work against you, leaving you tired but wired, prone to belly fat, breaking out, sleeping badly, and craving sugar like your life depends on it.
But, the key takeaway is that cortisol isn’t the bad guy. The focus should be on balance, not wiping it out entirely.
You may have seen cortisol belly all over social media. While it’s not an official medical term, there’s truth behind it. Chronically high cortisol can shift where your body stores fat, favouring the belly area.
Interestingly, your abdominal area actually has more receptors for cortisol than anywhere else in the body, so when stress is constant, that’s where your body chooses to store extra fat. And it’s not about your body being spiteful, it’s a survival tactic! Cortisol works closely with insulin here too, because both hormones are heavily involved in blood sugar control.
Here’s the chain reaction:
When your brain thinks you’re in danger (and it can’t always tell the difference between a looming work deadline and being chased by a tiger), it wants quick, easy to access energy, and belly fat is the perfect store. And yes, fat cells can reactivate cortisol through that 11β-HSD1 enzyme, which is how this cycle keeps going.
And this isn’t just surface level fat. Cortisol belly is made up of visceral fat, the type that sits deep around your organs. It’s more metabolically active than other fat, which means it contributes to inflammation, can mess with hormones, and may raise the risk for blood sugar issues. Plus, it’s stubborn, and it doesn’t shift easily with typical diet and exercise advice.
Throw in poor sleep, blood sugar crashes from skipped meals, over exercising, and you’ve got a perfect storm for keeping cortisol high and belly fat stubborn. So, if you’ve been eating well and moving daily but still struggling with a little extra gained weight, it’s worth looking at stress and cortisol, not just calories.
Here’s something we don’t talk about enough, cortisol doesn’t just live in your bloodstream, it can be stored in your skin. In fact, your skin has its own stress response system, and high or imbalanced cortisol can:
This is why periods of high stress so often show up as flare ups, whether that’s acne, eczema, or rosacea. Your skin is literally wearing your stress.
Long term high cortisol is also linked with increased AGEs (advanced glycation end products), these can damage collagen and elastin, speeding up visible ageing.
A quick explainer on AGEs - sugar in your bloodstream can stick to proteins like collagen and elastin (the fibres that keep skin plump and springy). This creates AGEs which are stiff, damaged proteins that make skin less bouncy and more prone to lines. High cortisol makes this worse by raising blood sugar and increasing inflammation, which means AGEs form faster.
So when you’re under constant stress, it’s not just that you ‘look tired’, the skin’s structure itself is being affected, making fine lines and sagging show up sooner.
Your skin can physically hold on to stress, so caring for your nervous system is just as important as your skincare routine.
Our Top 3 Supplements for Cortisol Support
That’s our little nugget on cortisol. We could honestly talk for hours about it, it really is fascinating. The most important thing to remember is that cortisol is essential to life and by no means the bad guy. We need it! The goal is simply to keep it in balance, preventing it from tipping too far and bringing along its less desirable side effects.
So if you’re stressed, not sleeping well, gaining weight around the middle, or just have a gut feeling that your cortisol is out of balance, then have a look at these suggestions.
These are our top supplements, but everyone is different and needs a personalised approach for the best results. One way to truly understand your cortisol pattern is through testing, which we do offer (we even wrote about it recently, if you fancy a read).
In the meantime, give our suggestions a go, and pass this on to friends, family, or anyone who could do with a little guidance.
Sarah-Lou is a Nutritional Therapist at Therapy Organics, providing expert qualified advice in one-to-one consultations, and offering advice in the shop.
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