Insulin Resistance Diet: Foods & Habits for Blood Sugar Balance

Insulin resistance happens when the body’s cells stop responding effectively to insulin. Insulin’s role is to take blood sugar into the cells, and when the cells are resistant to insulin, high blood sugar may result. Over time, insulin resistance dramatically increases the risk of type 2 diabetes, weight gain, and metabolic disorders. Diet and lifestyle changes can significantly improve insulin sensitivity and reduce the risk of developing type 2 diabetes.

Dietary recommendations

Consume protein at every meal

Protein slows down digestion and glucose absorption, preventing blood sugar spikes, stabilising energy levels and supporting muscle mass, which enhances insulin sensitivity.¹ Choose a wide variety of plant-based proteins such as tofu, tempeh and legumes. At least one-quarter of your plate should be protein if you consume animal proteins; if you are consuming plant proteins, it should be up to half of your plateful.

Plate guide: half plate plant based protein, half plate non starchy vegetables.

Choose fibre-rich foods

Fibre slows digestion and glucose absorption, prevents blood sugar spikes and feeds beneficial gut bacteria.² Prioritise non-starchy vegetables (e.g. broccoli, spinach and cauliflower), legumes, chia seeds, flaxseeds and whole grains (quinoa, oats, brown rice), which promote better insulin sensitivity by reducing glucose surges.

Limit refined carbohydrates and sugar

Sugar and refined carbohydrates such as white bread, pasta, pastries, fizzy and sugary drinks and processed snacks cause rapid blood sugar spikes and contribute to insulin resistance. Reduce or avoid these and choose complex carbohydrates like whole grains and beans to keep blood sugar steady.

Consume whole, unprocessed foods

Whole foods help stabilise blood sugar and reduce insulin spikes. Processed foods often contain hidden sugars and unhealthy fats that worsen insulin resistance.³

Increase healthy fats

Healthy fats help regulate and stabilise blood sugar, improve cell membrane function and improve insulin sensitivity.⁴ Include avocados, nuts, seeds, olive oil and fatty fish (salmon, mackerel) to reduce inflammation and enhance insulin sensitivity. Avoid trans fats and refined vegetable oils.

Eat low-glycaemic foods

Low-glycaemic foods (e.g. quinoa, berries, lentils and other legumes, vegetables and whole grains) release glucose slowly, causing slower rises in blood sugar. This prevents insulin surges and spikes, promotes sustained energy levels and improves metabolic health.

Consume apple cider vinegar (ACV)

Some studies suggest taking ACV may improve insulin sensitivity. Taking 1-2 tablespoons of ACV before meals can improve insulin sensitivity and help lower post-meal blood sugar levels.

Stay hydrated

Proper hydration is needed for proper blood glucose control. Water helps flush excess glucose from the bloodstream and supports metabolic function. Drink at least 2 litres of water throughout the day.

Consider intermittent fasting

Intermittent fasting may help improve insulin sensitivity by allowing the body to use glycogen stores. A 12-16 hour fasting window – eating within a specific time window (e.g. 8-10 hours) – improves insulin sensitivity, lowers fasting blood sugar and promotes metabolic flexibility.⁵

Balance macronutrients

Combine carbohydrates with protein and healthy fats at each meal to slow glucose absorption and reduce blood sugar fluctuations.

Lifestyle recommendations

Exercise regularly

Both strength (resistance) and endurance training increase cell sensitivity to insulin.

• Strength training increases muscle glucose uptake, improving insulin sensitivity.
• Walking for 10-15 minutes after meals reduces post-meal blood sugar spikes.
• High-intensity interval training (HIIT) enhances glucose metabolism and burns excess sugar.

Manage stress

Chronic stress raises cortisol levels, which can lead to insulin resistance, as cortisol puts glucose into the blood stream for utilisation. Actively reducing stress can lower stress hormones and improve insulin sensitivity and response. Try meditation, deep breathing exercises, yoga and tai chi.

Prioritise sleep

Poor or inadequate sleep is associated with insulin resistance and inadequate blood sugar control. It increases cortisol, which disrupts insulin regulation and increases cravings for high-sugar foods. Aim for at least 8 hours of quality sleep per night to support metabolic health.

Avoid late-night eating

Eating close to bedtime can disrupt insulin function, worsen insulin resistance and lead to higher fasting blood sugar levels in the morning. Don’t eat for at least 3 hours before bed, and try to eat larger meals earlier in the day.

Limit alcohol and quit smoking

Both alcohol and smoking contribute to metabolic dysfunction, increasing insulin resistance and inflammation. Excessive alcohol impairs glucose metabolism, while smoking increases insulin resistance. Reducing or eliminating them is beneficial.

Monitor blood sugar

Track blood glucose levels to identify patterns and triggers. A continuous glucose monitor helps identify blood sugar spikes and their causes – an excellent way to see your reaction to food and stress in real time.

Cold exposure

Cold showers or ice baths may improve insulin sensitivity by activating brown fat (metabolically active), which helps regulate blood sugar levels more effectively.