If you’ve ever found yourself thinking, “my hormones must be the reason everything feels off”, whether that’s ongoing digestive symptoms, fatigue, weight changes or just feeling disconnected from your body, you’re not alone and importantly, you’re not wrong to ask the question, but the answer is almost never what social media or wellness culture would have you believe.
Hormones are often positioned as the root cause of everything from stubborn fat loss to gut dysfunction, yet when we step back and look at the physiology, particularly in the context of inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), and chronic digestive symptoms, a more nuanced and frankly more empowering picture emerges: hormones matter, but not in the way most people think, and crucially, they are rarely the primary lever we need to pull.
What matters more is how your behaviours, environment, stress levels, sleep and nutritional patterns interact with your endocrine system and your gut–brain axis, creating a feedback loop that either supports or disrupts your physiology over time.
So in this article, we’re going to unpack the science properly (without oversimplifying it) and then translate that into practical steps you can actually use in your day-to-day life.
At its simplest, the endocrine system is a network of glands that release hormones into the bloodstream to regulate key physiological processes including metabolism, growth, reproduction, sleep and mood.
That list alone should tell you something important: hormones are not isolated to one function; they are part of an integrated system that is constantly responding to internal and external signals.
One of the most important concepts to understand here is homeostasis, and more specifically, negative feedback loops.
A negative feedback loop is a regulatory mechanism where a stimulus triggers an opposite response in order to maintain stability within the body.
For example:
This constant adjustment is happening in the background all the time, and it’s why the idea of “optimising” hormones in isolation often misses the point - your body is already doing everything it can to regulate them based on the inputs it receives.
When we talk about gut health, particularly in conditions like Crohn’s disease, ulcerative colitis and IBS, we can’t separate the gut from the brain or from the endocrine system.
The gut–brain axis is a bidirectional communication system involving:
This means your thoughts, stress levels, sleep patterns and emotional state are not just “psychological”...they are physiological inputs that influence hormone release, gut motility, inflammation and symptom perception.
This is where things become clinically meaningful, because it shifts the focus from trying to “fix” hormones directly to understanding how your day to day life is shaping the hormonal environment your body operates in.
Let’s break down the main players, but with a critical lens.
Cortisol is often labelled as the villain, particularly in gut health circles, but this is an oversimplification that can actually be unhelpful.
Cortisol follows a natural rhythm, typically peaking in the morning and declining throughout the day, and it plays a crucial role in:
Research discussed in the lecture material highlights that cortisol increases acutely in response to exercise and other stressors, which is both normal and necessary.
Where issues arise is not with cortisol itself, but with chronic dysregulation, often driven by prolonged psychological stress, poor sleep, and ongoing physiological strain.
In the context of IBD and IBS, this matters because:
However (and this is important) elevated cortisol does not automatically prevent fat loss or “damage” your metabolism, despite what you might have heard.
In fact, one of the more grounded takeaways from the lecture content is that while cortisol can contribute to water retention, it does not inherently block fat loss.
So instead of trying to “lower cortisol” directly, the more useful question becomes:
What is driving chronic stress in your life and what can we realistically change?
Insulin is one of the most misunderstood hormones, particularly in the context of gut health and weight regulation.
It is produced by the pancreas and plays a central role in:
Interestingly, insulin is also anorexigenic, meaning it helps suppress appetite, which challenges the common narrative that insulin is purely a “fat storage hormone”.
From a gut health perspective:
Again, the takeaway is not to manipulate insulin directly, but to build consistent, balanced eating patterns that allow the body to regulate itself effectively.
The thyroid plays a significant role in regulating metabolic rate and dysfunction can have noticeable effects on energy levels, digestion, and overall wellbeing.
For example, hypothyroidism (often indicated by elevated TSH levels) is associated with symptoms such as:
In individuals with digestive conditions, these symptoms can overlap with gut-related issues, making it important not to jump to conclusions without appropriate testing.
Crucially, while thyroid hormones have a “big effect” on metabolism, as highlighted in the lecture material, they are not easily modified through diet or lifestyle alone, which reinforces the importance of working within your sphere of control rather than chasing hormonal manipulation.
There is a persistent belief that increasing hormones like growth hormone or testosterone will significantly enhance muscle growth, fat loss or recovery.
However, the research cited in the lecture slides, including work by Phillips (2012), challenges this assumption.
Acute increases in so-called “anabolic hormones” during exercise do not appear to meaningfully drive muscle hypertrophy or long-term adaptations.
This is a crucial point, particularly in a world where people are encouraged to chase hormonal spikes through specific workouts or supplements.
The reality is far less glamorous:
These are what actually matter.
Leptin (satiety hormone) and ghrelin (hunger hormone) are often discussed in the context of appetite regulation.
While they do play important roles, they are also heavily influenced by:
Which means they are not independent drivers of behaviour, but rather part of a larger system that responds to your lifestyle.
This is where behaviour change becomes central, because rather than trying to “fix” hunger hormones, we focus on building patterns that support more stable appetite regulation over time.
Let’s address this directly, because it’s one of the biggest barriers I see in practice.
The idea that you need to optimise your hormones before you can improve your gut health, lose fat, or feel better is not only misleading and it can be paralysing.
“Don’t try to manipulate hormones. Try to manipulate people.”
That might sound blunt, but it captures something important:
This doesn’t mean hormones are irrelevant, but it does mean that chasing them directly is often the least effective approach.
If we bring this back to IBD, IBS and chronic digestive symptoms, the evidence consistently points towards a set of core factors that influence both gut health and hormonal regulation.
Irregular eating patterns, extreme dieting and constant changes in routine can create unnecessary stress on the body.
Consistency provides stability, which supports both digestive function and hormonal balance.
Sleep influences:
Poor sleep is one of the most underestimated drivers of both hormonal dysregulation and gut symptoms.
This doesn’t mean eliminating stress, it means building capacity to respond to it.
For some people, that might be:
The key is sustainability, not perfection.
For individuals with IBD or IBS, overly restrictive approaches can often do more harm than good, both physically and psychologically.
Instead, we focus on:
This is where the growth mindset piece becomes essential.
You don’t need to get everything right immediately.
You need to build patterns that are:
If you take nothing else from this article, start here:
Hormones are not the enemy and they are not the magic solution either.
They are part of a complex, adaptive system that responds to how you live your life, which means the most powerful changes rarely come from targeting hormones directly, but from building a foundation of behaviours that support your body as a whole.
And if you’re living with IBD, IBS or ongoing digestive symptoms, this shift in perspective can be the difference between feeling stuck and starting to move forward.
If you want personalised support to improve your gut health, build sustainable habits and feel more in control of your body again:
Book a free consultation call with me here:
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