Rainbow Oncology

13/11/2025

01/11/2025

www.rainbowoncology.co.za

23/10/2025

The Truth About Sugar and Cancer: What You Really Need to
Know - Mare Wortman - Registered Dietitian

One of the most common myths I hear is: “Sugar feeds cancer.” It’s an understandable worry — but the truth is far more nuanced. Let’s clear it up.

All cells in your body — healthy and cancerous — use glucose (a type of sugar) for
energy. That doesn’t mean eating a sweet treat will suddenly make cancer grow faster.

Your body tightly regulates blood sugar levels, and it will make glucose from other
sources — even protein and fat — if you avoid carbohydrates completely.
So, no — eating sugar does not directly feed or cause cancer.

What the research does show is that a diet consistently high in refined sugars,
processed foods, and excess calories can contribute to obesity, insulin resistance, and inflammation — all of which create an environment where cancer is more likely to thrive.

That’s where the confusion comes from. It’s not the single piece of chocolate or slice of cake that’s the issue — it’s a long-term pattern of eating ultra-processed foods and sugary drinks without balance.

Here’s the Sweet Truth: You Can Still Enjoy Sugar — Mindfully
 If you want an occasional dessert or a square of chocolate, you absolutely can.
 Choose mindful indulgence over daily excess — quality over quantity.
 Focus on a balanced, whole-food diet rich in fruit, vegetables, lean proteins, and
healthy fats.
 Avoid fear-based restriction — food should never cause guilt or anxiety.
Sugar alone doesn’t feed cancer. A balanced diet — not deprivation — is what supports healing and health.

So, enjoy your treats occasionally, focus on real food most of the time, and remember: nourishment, not fear, is what truly heals.