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ZOE Science & Nutrition · August 20, 2026 · 55m

5 ways to control your blood sugar, reverse insulin resistance, and reduce your heart disease risk

Prof Rob Semple
Show Notes

Professor Rob Semple explains how insulin resistance — a condition affecting roughly 1 in 4 people — quietly raises the risk of heart disease and cancer, often with no change in blood sugar and no obvious symptoms. The episode covers what insulin does, why its absence was once fatal, how resistance progresses toward type 2 diabetes, and five practical strategies for regaining insulin sensitivity: managing weight (especially visceral fat), using exercise strategically, reducing stress, prioritizing sleep consistency, and recognizing that rapid post-meal blood sugar drops can be an early warning sign. Semple also discusses visible skin signs of high insulin and why generic online symptom lists are often misleading.

This summary was generated from show notes and public descriptions, not from a full transcript review. Details may contain inaccuracies.

Canon

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Insulin Resistance as a Cancer Risk Factor00:00
Insulin resistance is an established risk factor for multiple types of cancer, with a 2026 Nature study linking it to 12 specific cancer types.
ClaudeChatGPTGemini

Highlights

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Insulin Resistance Is Common and Hidden00:00
Roughly 1 in 4 adults have insulin resistance, which quietly raises the risk of heart disease and cancer, often with no change in blood sugar and no obvious symptoms.
ClaudeChatGPTGemini
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Post-Meal Shakes as an Early Warning Sign17:12
Feeling shaky and sweaty roughly an hour after eating can be a sign of insulin resistance — the body is overcorrecting after a blood sugar spike.
ClaudeChatGPTGemini
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Visible Skin Signs of High Insulin24:15
High circulating insulin can cause visible skin changes, including skin tags and darkened patches called acanthosis nigricans, which can appear long before blood sugar abnormalities show up on standard tests.
ClaudeChatGPTGemini
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Why 'Just Lower Your Insulin' Advice Can Backfire14:01
Aggressively lowering insulin without addressing the underlying problem can be dangerous because insulin is essential for life — without it, cells cannot take up glucose and the body wastes away.
ClaudeChatGPTGemini
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Five Practical Steps to Reverse Insulin Resistance35:37
Insulin resistance is reversible, and Semple outlines five evidence-based strategies: focus on weight and visceral fat reduction, use exercise strategically to burn blood sugar, manage stress, prioritize sleep consistency, and pay attention to meal composition.
ClaudeChatGPTGemini

Editorial

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White Bread vs. Can of Coke — Similar Blood Sugar Impact41:14
Semple suggests that from a blood sugar perspective, white bread may not be meaningfully different from a can of cola.
ClaudeChatGPTGemini
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Insulin Resistance May Have Been a Survival Advantage55:00
Semple discusses the evolutionary perspective that insulin resistance may have once helped humans survive periods of famine by conserving glucose.
ClaudeChatGPTGemini

References

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Insulin resistance is a risk factor for 12 types of cancer — Nature (2026) (2026) — Study linking insulin resistance to multiple cancers
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Association of insulin resistance with cancer — American Journal of Cancer Research (2016) — Earlier evidence establishing the insulin–cancer link
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Global prevalence of insulin resistance — Frontiers in Endocrinology (2025) — Data on how widespread insulin resistance is in the US and UK
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Risk Reclassification Beyond BMI — JACC (2026) — Why weight distribution matters more than BMI alone

Misc

✧Semple explains that insulin resistance may have once been a survival advantage, helping the body conserve glucose during times of scarcity.
✧The 'shaky, sweaty feeling' an hour after eating can actually be a signal of insulin resistance — the body overcorrecting after a blood sugar spike.
✧A visible skin sign of high insulin: skin tags and darkened patches of skin (acanthosis nigricans) can appear long before blood tests show problems.
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