Metabolic Foundations

Insulin Resistance — In Plain English

Insulin resistance happens when your cells stop responding efficiently to insulin. The result? Higher blood sugar, higher insulin levels, and a metabolism that feels harder to manage.

By Thomas Kloos • March 1, 2026 • 6 min read

First: What does insulin do?

Insulin is a hormone that helps move glucose (sugar) from your bloodstream into your cells, where it can be used for energy.

Think of insulin as a key. It unlocks your cells so glucose can enter.

When resistance develops

Over time, if insulin is constantly elevated, your cells can become less responsive. The “key” doesn’t work as smoothly — so your body produces more insulin to compensate.

Why it matters

  • Higher fasting glucose
  • Higher A1C over time
  • Increased fat storage (especially around the waist)
  • Energy crashes and cravings
  • Greater long-term risk for type 2 diabetes

What contributes to insulin resistance?

  • Frequent high refined carbohydrate intake
  • Chronic stress and elevated cortisol
  • Poor sleep
  • Low muscle mass
  • Low physical activity

Good news: it’s reversible

Insulin resistance is not a life sentence. The body adapts in both directions.

Three practical starting points

  1. Prioritize protein at meals.
  2. Strength train 2–3 times per week.
  3. Walk after meals when possible.

The goal is not perfection. The goal is to create a steadier environment inside your body so glucose handling improves over time.