Signs of Insulin Resistance Every Indian Adult Should Monitor

Written by Aarti Laxman, Co-Founder & Chief Nutrition Officer, Artinci — Certified in Low-Carb Nutrition & Metabolic Health (CPD UK) · Last updated June 2026

Insulin resistance is the quiet beginning of most metabolic trouble — it sits upstream of type 2 diabetes by years, often a decade or more. The frustrating part is that in its early stages it's usually silent, picked up only on a blood test most of us don't think to ask for. But the body does give a few visible hints along the way. This is a practical self-check: the signs you can actually spot in the mirror or notice in your day, what each one means, and when to stop guessing and get tested. (For the deeper "what insulin resistance actually is, and how it differs from diabetes," see our companion guide linked below.)

One thing to hold onto as you read: each of these is a flag, not a diagnosis. Any one of them can have other causes. It's when two or three show up together that they're worth taking seriously — and the only way to confirm is a blood test.

The skin tells the clearest story

Of all the at-home signs, the skin is the most reliable, because several skin changes are driven directly by high insulin. Here's the mechanism in one line: when insulin stays high for years, it doesn't just act on blood sugar — it also switches on a growth-signalling pathway (IGF-1) that tells skin cells and oil glands to grow and multiply. That's why the earliest visible clues so often show up on your skin.

1. Dark, velvety patches (acanthosis nigricans) — the strongest sign

Where to look: the back and sides of the neck, the armpits, the groin, sometimes under the breasts or over the knuckles.

What you'll see: skin that looks thicker, darker, and almost velvety — people often think it's dirt that won't scrub off, or assume it's just their natural colouring getting darker in a patch.

This is the closest thing to a hallmark sign of insulin resistance. Those high insulin levels, working through that IGF-1 growth pathway, drive the thickening and darkening. If you have clear acanthosis nigricans, it's worth a blood test — and the encouraging part is that as insulin sensitivity improves, these patches often fade over time.

2. Skin tags

Where to look: small, soft, flesh-coloured flaps of skin on the neck, eyelids, armpits, or under the breasts.

Skin tags come from the same growth-signalling process, which is why they so often appear in the same people, in the same areas, as the dark patches. A skin tag or two is common and harmless. But a sudden crop of several, especially alongside the dark patches, points in the same direction.

3. Persistent, inflamed adult acne

What to notice: deep, red, painful acne — along the jaw, chin, and sometimes the back — that shows up or refuses to settle in your late 20s, 30s, and beyond, long after your teenage years should have ended it.

The same insulin/IGF-1 pathway tells oil glands to grow and produce more sebum, and fuels the inflammation behind these deeper breakouts. A high-sugar, high-refined-carb diet pushes this further. I'll be honest about the strength of this one: acne has many causes — genetics, hormones, skincare, stress — so on its own it's a softer signal than the dark patches. But persistent, inflamed adult acne that clusters with the other signs here is worth paying attention to, and many people find it calms down as they bring sugar and refined carbs down and insulin sensitivity improves.

Beyond the skin: two everyday signs

4. Stubborn belly fat — measured by your waist, not the scale

This is the one most of us get wrong, because we judge it by weight. Insulin resistance specifically encourages fat storage around the organs — visceral fat — which is metabolically active and inflammatory in a way that fat elsewhere isn't. You can be a "normal" weight on the scale and still carry too much of it. We Indians are especially prone to this "thin outside, fat inside" pattern, which is why waist size matters more for us than BMI.

How to check (use these South-Asian cut-offs, which are lower than Western ones): measure around the narrowest point of your waist, above the hip bone. A waist above 90 cm (about 35 inches) for men, or 80 cm (about 31–32 inches) for women, is the threshold where risk climbs for us. Note how much tighter these are than the figures you'll see on Western health sites — that's deliberate, because we develop these problems at lower body sizes.

5. The afternoon energy crash and sugar cravings

What to notice: heavy tiredness an hour or two after a carb-heavy meal, a 3–4 pm slump, and a strong, recurring pull toward something sweet or starchy — chai with sugar, biscuits, rice.

When cells stop responding well to insulin, your energy supply becomes a series of spikes and crashes rather than a steady line. The crash is the body asking for a quick fix, which is why the cravings ride along with it. This is the least specific sign on the list — plenty of things cause an afternoon dip — but a daily, predictable post-meal crash-and-crave cycle fits the pattern.

One important correction: thirst and frequent urination are not early signs

A lot of articles list constant thirst and frequent urination as "signs of insulin resistance." They aren't — at least not early ones. Those symptoms appear when blood sugar is already running high enough to spill into the urine, which is generally the stage of diabetes, not the silent insulin-resistance phase that comes years before. So if you're genuinely thirsty all the time and urinating far more than usual, please don't treat it as an early warning to watch — treat it as a reason to see a doctor and get your blood sugar checked soon, because it may mean things have already progressed.

Spotted two or more? Here's what to do

If a couple of these ring true, the next step isn't to panic or to self-diagnose — it's a simple blood test. Ask your doctor for fasting glucose and HbA1c, and importantly, a fasting insulin test alongside them. That last one matters because insulin resistance can be present for years while your glucose still reads "normal" — your body is just working harder, pumping out more insulin to keep things looking fine. Fasting insulin catches that earlier.

The numbers, what they mean, how the fasting-insulin and HOMA-IR calculation works, and how insulin resistance differs from full type 2 diabetes — we cover all of that in detail in our companion guide, Insulin Resistance vs Type 2 Diabetes. Read that next if any of these signs apply to you.

The genuinely hopeful part: caught at this stage, insulin resistance responds well. It isn't a life sentence — with steady changes to food, movement, and sleep, insulin sensitivity can improve substantially, and many people bring their numbers back into a healthy range and keep them there. The visible signs often quieten as that happens. Reducing added sugar and refined carbs — especially the liquid kind, like sugary chai — is one of the most effective levers, which is the whole reason we built Artinci's no-added-sugar range: so cutting sugar doesn't have to mean giving up the foods you love.

Frequently asked questions

What are the early warning signs of insulin resistance?

Insulin resistance is usually silent early on, but visible clues include dark, velvety skin patches on the neck or armpits (acanthosis nigricans), clusters of skin tags, persistent inflamed adult acne, stubborn belly fat (judged by waist size, not weight), and a regular post-meal energy crash with sugar cravings. Each is a flag rather than a diagnosis — two or more together is worth a blood test.

Can you see insulin resistance on your skin?

Often, yes. High insulin acts through a growth pathway (IGF-1) that affects skin, so dark velvety patches, skin tags, and persistent inflamed acne can all be visible signs. Dark velvety patches (acanthosis nigricans) are the most specific; acne is a softer, less specific clue because it has many other causes.

Is belly fat a sign of insulin resistance?

Stubborn fat stored around the organs (visceral fat) is closely linked to insulin resistance, and it's better judged by waist size than by weight. For South Asians, a waist above about 90 cm in men or 80 cm in women signals raised risk — lower thresholds than Western guidelines, because we develop these problems at lower body sizes.

Are thirst and frequent urination signs of insulin resistance?

Not early ones. Excessive thirst and frequent urination usually appear once blood sugar is high enough to spill into the urine, which is generally the diabetes stage rather than the earlier, silent insulin-resistance phase. If you have these symptoms, see a doctor and get your blood sugar checked soon, as it may mean things have already progressed.

Can insulin resistance be improved or reversed?

Caught early, insulin resistance responds well. It's not permanent — with consistent changes to diet, movement, and sleep, insulin sensitivity can improve significantly, and many people bring their markers back into a healthy range. Reducing added sugar and refined carbs, especially sugary drinks, is one of the most effective steps.

What test confirms insulin resistance?

Ask for fasting glucose, HbA1c, and a fasting insulin test. Fasting insulin matters because insulin resistance can exist for years while glucose still reads normal. From fasting insulin and glucose, a doctor can calculate HOMA-IR, a simple measure of insulin resistance. Our companion guide on insulin resistance versus type 2 diabetes explains these numbers in detail.

This article is for general education and is not medical advice. It can't diagnose insulin resistance — only a doctor and a blood test can. If you notice these signs, please get checked.

Sources

• Indian Journal of Dermatology, Venereology & Leprology — Role of insulin resistance and diet in acne (IGF-1 / glycemic load mechanism)
• Frontiers in Physiology, 2023 — Insulin and the sebaceous gland: insulin/IGF-1 effects on sebocytes and acne
• American Diabetes Association — Standards of Care: prediabetes thresholds (fasting glucose 100–125 mg/dL; HbA1c 5.7–6.4%)
• National Academy of Medical Sciences (India) task force — obesity, visceral fat and the "thin-outside-fat-inside" South Asian phenotype
• Lustig RH, Metabolical (2021); Means C, Good Energy (2024) — fasting insulin and early insulin resistance