Insulin resistance: what to eat to improve it

What it is and why what you eat matters

Insulin is the hormone that tells your cells to take up glucose from the blood. In insulin resistance, those cells "hear" the signal worse, so the pancreas has to shout louder — produce more insulin — to get the same effect. That chronic excess of insulin promotes fat storage (especially abdominal), fuels problems like PCOS and fatty liver, and, if not stopped, progresses towards prediabetes and type 2 diabetes. Here is the practical key: every meal that causes a big glucose spike demands a big insulin spike. Eating so that glucose rises slowly is, literally, letting the system rest.

What to prioritise on your plate

The base is a low-glycaemic-index pattern, similar to the Mediterranean one. These are the pillars:

• Low-glycaemic-index carbohydrates: legumes, oats, quinoa, wholegrain bread and pasta, whole fruit (not juices).
• Protein at every meal: eggs, fish, lean meat, dairy, legumes, tofu. It flattens the glucose curve.
• Plenty of fibre: vegetables filling half the plate, legumes, whole fruit. It directly improves insulin sensitivity.
• Healthy fats: extra-virgin olive oil, oily fish, avocado, nuts.
• Vinegar or lemon and fermented foods: small helpers that can soften the glucose response.

What is best to cut

The other side of the coin: what spikes glucose and insulin. Without demonising, the point is that they stop being the base of your day. Added sugars and soft drinks (the big culprits), pastries and sweets, refined flours (white bread, white pasta and rice in excess) and ultra-processed foods. A simple, powerful change: swap the refined version for the wholegrain one and always pair the carbohydrate with protein or vegetables. The order trick also helps — starting the meal with vegetables and protein, and leaving the carbohydrate for last, reduces the glucose spike.

Exercise and weight: the other two levers

Diet does not act alone. Exercise improves insulin sensitivity independently: strength training empties the muscle's glycogen stores (which then "pull" glucose from the blood) and aerobic exercise improves metabolism. And if there is excess weight, losing 5-10% is one of the interventions that most improves insulin resistance, according to the big diabetes-prevention programmes. You do not need to reach your "ideal weight": small changes already move the metabolic needle.

Before you start

Insulin resistance is a medical matter: it is diagnosed with blood tests, can come with other conditions (PCOS, fatty liver, high blood pressure) and sometimes needs drug treatment. Use this guide to understand how your food influences the day to day, but pair the changes with your doctor or a dietitian, especially if you take glucose medication. Food is a huge lever — but it is part of a plan worth supervising.