The weight loss approaches that worked at 35 stop delivering, the belly fat holds on regardless, and by three in the afternoon you’d happily put your head on the desk. It gets read as effort. It’s more often a blood sugar pattern, and it’s one of the more common things we see in women in their forties and fifties.
What is insulin resistance? Cells stop responding as effectively as they did previously to insulin, so the pancreas produces more of it to move glucose out of the bloodstream. Blood sugar can look completely normal for years while insulin runs high in the background, doing what insulin does: favouring storage, particularly abdominal storage, and making it harder to access fat for fuel. That’s the reason it slips past routine bloods, and the reason it can quietly undo a lot of otherwise sensible effort.
Start here this week: note your energy two hours after each meal for seven days. A repeatable crash at the same point after the same kind of meal is worth taking to your GP.
Insulin’s job is to get glucose out of the bloodstream and into cells. When cells respond less readily, the pancreas compensates by producing more. For a long stretch, that compensation works. Blood sugar stays in range and nothing looks wrong on paper, while insulin sits higher than it should for most of the day.
Midlife stacks the odds. Falling oestrogen affects insulin sensitivity and shifts fat storage towards the abdomen, where it’s more metabolically active. Lean muscle declines with age, and muscle is where most post-meal glucose goes, so less of it means less capacity to clear a meal. Broken sleep reduces insulin sensitivity measurably within days. Put those together and a woman doing nothing different from what she did at 35 can end up with a meaningfully different response to the same lunch.
Pro Tip: Insulin resistance isn’t a yes or no. It sits on a spectrum, and it moves. That’s the useful part, because it means the direction of travel is changeable well before anything reaches a diagnostic threshold.
None of these confirms anything on its own. Several together, in a woman in her forties or fifties, is a pattern worth investigating properly rather than working harder around.
Weight that concentrates around the middle and stays there through approaches that used to work. High insulin favours storage, and the abdomen is where midlife hormonal change already directs it, so the two reinforce each other. Some of that is visceral fat sitting around the organs, which is more metabolically active than the fat under the skin and contributes to the insulin resistance in turn.
Not a general fondness for sweet things. A specific, insistent pull towards sugar or refined carbohydrate an hour or two after eating a meal that should have kept you satisfied. When the insulin response to a meal overshoots, blood sugar drops faster and lower than it should, and the body asks for the quickest available fix. Women routinely file this under willpower. It’s a signal, and it’s worth reading as one.
The need to lie down after lunch. Reading the same paragraph three times mid-afternoon. Feeling wiped out after a meal, particularly a carbohydrate-heavy one, is common in this pattern and it’s not a normal cost of being in your forties. If eating reliably makes you less functional for the following two hours, that’s information.
Skin tags, particularly clusters on the neck, armpits or groin, are associated with elevated insulin. So is acanthosis nigricans, a velvety darkening of the skin in the same areas. Both are harmless in themselves. Both are worth mentioning to your GP if they’ve appeared alongside anything else on this list, because they’re visible markers of something happening metabolically.
This one isn’t a sign so much as a loaded dice. A parent or sibling with type 2 diabetes raises your likelihood, as does a history of gestational diabetes or PCOS. Genetics set the starting position rather than the destination, but they’re a reason to look earlier rather than waiting for something to become obvious.
Pro Tip: The 3pm crash is the most reliable everyday signal in this list, because you can track it without a test. Same time each day, worse after certain meals, better on days you ate protein at breakfast. Write it down for a week before you decide it’s just your schedule.
Because the usual test measures the wrong thing first. A routine panel typically includes fasting glucose, sometimes HbA1c. Both describe blood sugar. Neither describes how much insulin your body is having to produce to keep blood sugar there, and in the early years that’s the whole story. Glucose stays normal precisely because insulin is working overtime, so a normal result can be accurate and unhelpful at the same time.
Fasting insulin, or a calculated measure such as HOMA-IR that uses fasting glucose and insulin together, gives a fuller picture. So does an oral glucose tolerance test with insulin measured alongside. These aren’t standard in every general check-up, and whether they’re appropriate for you is a conversation with your GP, based on your history and symptoms. We can’t order or interpret them in place of your doctor, and nor should we.
What body composition adds is the structural half of the picture: how much muscle you’re carrying, how much fat, and how much of that fat is sitting centrally. Those markers track closely with insulin sensitivity, and unlike bloods, they’re something you can watch change month to month.
Most of it is unglamorous, and the order it’s done in matters more than people expect.
| What | Why it works |
| Resistance training, two to three days a week | Builds and holds the tissue that takes up most post-meal glucose. Improves insulin sensitivity independently of any weight change |
| Protein and fibre at every meal | Slows the rise in blood sugar after eating, which lowers the insulin response and softens the crash that follows |
| Fewer standalone refined carbohydrates | Not removal. Pairing and portioning. A slice of toast on its own asks more of the system than the same toast with eggs |
| Sleep, protected properly | Short and fragmented sleep reduces insulin sensitivity within days, and it undercuts the training that would otherwise help |
| A ten minute walk after the largest meal | Muscle contraction clears glucose from the bloodstream without needing insulin to do it. Small input, disproportionate effect |
Changes tend to register in energy and cravings within a few weeks, well before body composition catches up. That’s the sequence to expect, and it’s worth knowing in advance so a flat month doesn’t get read as nothing happening.
It responds well to the right inputs, and for many women the direction can be substantially changed. How far, and how fast, depends on where you’re starting, how long it’s been running and what else is going on, which is why it’s worth assessing rather than assuming. Anything to do with diagnosis, medication or a formal treatment plan belongs with your GP.
Not properly. Home glucose monitors read blood sugar, which is the number that stays normal longest in this pattern, so a reassuring result doesn’t rule much out. Continuous glucose monitors show more, but they still don’t measure insulin. A blood test through your GP is the reliable route.
No. Wholegrains, legumes, fruit and vegetables all contribute fibre and nutrients your body needs. What changes the response is what you eat them with, how much at a sitting, and what your muscle mass looks like. Removal tends to produce a quick drop that’s partly fluid, followed by a plan you can’t sustain.
Energy and cravings often shift inside four to six weeks with consistent changes. Body composition moves more slowly than that. Full change takes longer and depends on the starting point, so treat the early markers as evidence you’re going the right way rather than the whole result.
No, and we’re careful about that. It’s not a diagnosis and it isn’t a substitute for blood work. What it gives you is a clear read on body composition, including visceral fat and muscle mass, alongside a proper conversation about your symptoms and history, so you know whether this is worth pursuing with your GP and what to ask for.
| Point | Details |
| Normal bloods aren’t a clean bill | Fasting glucose can read normal for years while insulin runs high to keep it there |
| Five signals worth reading together | Central fat that won’t shift, timed cravings, post-meal fatigue, skin tags or skin darkening, family history |
| Muscle does the clearing | Skeletal muscle takes up most post-meal glucose, so lean mass loss in midlife directly worsens the pattern |
| Sleep counts as an intervention | Short sleep reduces insulin sensitivity within days, no dietary change required |
| Assessment beats another diet | Body composition plus a proper history tells you whether to take this to your GP and what to ask for |
BBN is a clinical nutrition practice in West Perth working predominantly with midlife women on weight loss and weight management. The team is nutritionists, clinical nutritionists and Accredited Practising Dietitians, and what a program looks like is decided by individual clinical assessment rather than one protocol applied to everyone.
Blood sugar sits in the Biology pillar of the BBN Bridge, which is where we start, because eating patterns built on top of an unaddressed blood sugar problem tend to produce excellent intentions and no result. In-clinic appointments include an InBody 570 body composition scan, which reports muscle, body fat and visceral fat separately. Where pathology is indicated we work alongside your GP rather than in place of them, and we’re clear about the line between what a body composition scan can show and what only blood work can confirm.
From the outside, a stalled result looks identical whether the cause is lost muscle, a blood sugar pattern, four months of broken sleep or a routine that stopped fitting your week. Those four need different first moves, and choosing the wrong one costs months you can’t get back.
That is what our $49 Health Check is for.
Every BBN client starts with a private 45-minute appointment with Maria, our owner and Health Coach. Together, you will look at your symptoms, health and weight history, sleep, energy, eating patterns, movement and what you have already tried.
At our Perth clinic, your appointment includes an InBody 570 body composition scan. This allows us to look at muscle, body fat and fluid separately, rather than averaging everything into one number.
You will leave with a clearer understanding of:
You won’t be handed a generic plan or pressured to sign up for anything. The Health Check is designed to help you understand your starting point before you spend more time, money and effort on an approach that may not fit.
Telehealth appointments include the same detailed review of your symptoms, history and priorities, without the body composition scan.
45 minutes. $49. Measure, don’t guess.
This article provides general nutrition information rather than individual clinical advice, and nothing here diagnoses insulin resistance or any other condition. Speak with your GP about testing and about your own situation.
Kickstart Your Journey to Better Health with Our Balanced Health Blueprint Consult – $49 (valued at $139)
