Chapter one
What is metabolic health?
Imagine a thread running through your body. It connects your energy levels to your blood sugar, your stress response to your sleep quality, your gut health to your hormones. That thread is your metabolism.
When it holds, you feel like yourself. When it frays, you feel it everywhere, often before tests pick up anything definitive. Many women I see in clinic describe feeling that something is off, without a clear picture of why. That is what this guide is for.
What we are measuring
Metabolic health is assessed through a cluster of markers rather than a single test. These include:
Insulin resistance may show up as one of these markers initially, alongside symptoms such as fatigue, poor sleep, and mood changes. But many people experience metabolic strain before reaching that clinical threshold, often from their late 30s and 40s, and for women more acutely through the perimenopause transition.
How it shows up day to day
You might recognise some of these:
“The thread between these symptoms is almost always metabolic. When we find the root cause, we can address the whole picture rather than each symptom in isolation.”
Chapter two
Why does this happen?
In clinic, I see the same three patterns appearing together, often from the late 30s and becoming more pronounced through perimenopause. I call this the Triad of Dysfunction. It is my clinical framework for understanding how metabolic imbalance develops, not a formal medical diagnosis.
1. Visceral fat
Fat stored around the organs rather than under the skin. Unlike subcutaneous fat, visceral fat is metabolically active. It releases inflammatory signals and fatty acids that directly disrupt insulin signalling. Oestrogen helps direct fat storage away from the abdomen. As oestrogen declines through perimenopause, fat distribution can shift substantially towards the midsection.
2. Insulin resistance
Insulin is the key that unlocks your cells to let glucose in. When cells stop responding to that key efficiently, blood glucose rises, and the pancreas has to produce more insulin to compensate. Over time this becomes a feedback loop. Blood sugar becomes harder to regulate. Energy becomes less stable. Fat storage increases.
What is well established is that nutrition, activity, sleep, and stress all have a direct, documented influence on how your cells respond to insulin.
3. Sarcopenia (muscle loss)
Muscle is the largest site in your body for glucose disposal. The more functional muscle mass you have, the more efficiently your body manages blood sugar. Muscle mass tends to decline from around age 30, a process that can accelerate through and after menopause, partly due to hormonal changes and partly due to reduced activity. This makes strength and movement one of the most important metabolic levers available.
The vicious cycle
These three patterns reinforce each other. Visceral fat drives insulin resistance. Insulin resistance promotes further fat storage. Reduced muscle reduces the capacity to clear glucose from the blood. Poor blood sugar control worsens fatigue, which reduces activity, which accelerates muscle loss.
The thread frays at multiple points simultaneously, which is why addressing one lever in isolation rarely produces lasting change. The RESET framework below addresses all five contributing factors together.
Blood sugar and how it feels
A destabilised blood sugar pattern creates a predictable daily arc. A high-carbohydrate meal or skipped meal triggers a sharp rise in blood glucose, followed by insulin release, followed by a drop. That drop triggers cortisol release, which creates urgency, cravings, and irritability, and signals the liver to release stored glucose, which restarts the cycle.
This is why the mid-afternoon slump, the 4pm craving, and the difficulty falling asleep are so often connected. They are signals from the same underlying pattern.
The Metabolic Thread
The rest of this guide is for readers.
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