As an Accredited Practising Dietitian (APD), I frequently hear variations of this question. There is a lot of fear surrounding sugar, but the reality of how it interacts with our bodies is much more nuanced than a simple “sugar equals diabetes” equation. This blog is specifically targeting type 2 Diabetes, as type 1 has no relationship to sugar and the disease’s onset.
Here is the truth behind sugar consumption, blood glucose levels, and your long-term healthspan.
The Short Answer: It’s Not Just About the Sugar
Eating sugar does not automatically result in a diabetes diagnosis. But (and it’s a big but), high total sugar consumption, especially from sugar-sweetened beverages like cordials, soft drinks, and fruit drinks, alongside ultra-processed foods, is strongly linked to an increased risk of Type 2 Diabetes.
This happens through two primary pathways:
1. Weight Gain and Systemic Inflammation
The Impact of Empty Calories
Refined sugars are “empty calories” that are incredibly easy to overconsume. When we consistently take in more energy than our bodies need, it leads to excess body fat, particularly around the abdomen. Increased abdominal visceral and subcutaneous fat increases systemic inflammation. This inflammation can dramatically contribute to insulin resistance, which is the driving force behind type 2 diabetes.
2. Liver Health and Fructose Metabolism
How Fatty Liver Interferes with Blood Glucose
High intakes of fructose (a type of sugar that does not instantly spike blood sugar) can lead to a fatty liver because large volumes are metabolised almost entirely by the liver. When liver health declines, it directly interferes with how your body manages and regulates blood glucose levels over time.
How Blood Sugar Spikes Tax Your Pancreas
Table sugar alone (usually sucrose) has a glycaemic index of ~65, leading to a moderate blood sugar spike. However, in large quantities, the total glycaemic load can be quite high, and the blood sugar spike is much larger depending on the total amount of the food consumed. Eating these foods in isolation—without other lower GI foods like fibre-rich plants or healthy fats—exaggerates this effect.
For more info on glycaemic index, check out our in-depth breakdown on the Glycaemic Index (GI) of common Australian foods.
The Vicious Feedback Loop of Insulin Resistance
To understand what happens, think of your body like a car and food like petrol. You need a “funnel” (insulin) to get the petrol into the tank (your cells).
Repeat exposure to very high levels of blood sugar-spiking foods (such as lots of sugar in one meal) taxes the pancreas. The higher and more often our blood sugar is spiked, the less our cells throughout our body respond to the insulin signal being produced. This means your “funnel” stops working well. This creates a vicious feedback loop: the more the pancreas is taxed trying to produce more insulin, the worse our body responds to handling high sugar amounts.
What You Can Do: A Realistic Nutrition Approach
Do you need to fear sugar and never eat it again?
No. Managing your health shouldn’t require flipping your life upside down or giving up the foods you love. At REAL Health & Nutrition, we firmly believe in food freedom. A rigid, restrictive mindset rarely lasts.
Do you need a balanced diet to reduce your risk?
Absolutely. Meeting your protein, fibre, healthy fats, and micronutrient needs to reduce your risk of developing type 2 diabetes is what I’d put my money on.
High-Return Strategies to Optimise Blood Glucose
Instead of just focusing on what to cut out, we focus on what to add.
- Focus on Very low to Low Glycaemic Index (GI) Carbohydrates: Swapping to lower GI and Glycaemic Load (GL) carbohydrates provides sustained energy without the aggressive spikes.
- Pair Foods Intelligently: By increasing your intake of fibre-rich plants, high-quality proteins, and healthy fats alongside carbohydrates, you can slow down the absorption of glucose into your bloodstream.
- Build Muscle to Improve Insulin Sensitivity: Muscle acts like a sponge for blood sugar. Improving your body composition and preserving muscle mass through training dramatically improves insulin sensitivity.
Get Expert Diabetes Dietitian Support
If your GP has mentioned that your blood sugars are “creeping up,” prediabetes is the last red flag you get before a diagnosis. You don’t have to navigate this with cookie-cutter meal plans or extreme dieting.
Working with Matthew Rigoni and the team of expert dietitians at REAL Health & Nutrition provides you with evidence-based Medical Nutrition Therapy tailored to your life. We help you stabilise your energy, improve your healthspan, and feel in control of your body again without the stress.
Want to learn more about diabetes? Check out our dedicated diabetes page
