SUGAR may be sweet, but its impact on your brain is not always so pleasant. While it provides a quick energy boost, excessive sugar consumption can negatively affect brain function, mood, and long-term mental health.

We have all heard about the negative impacts of sugar, and how understanding its impact on the body is the first step towards cutting it out, or cutting back.

“Understanding how sugar interacts with your brain and learning how to reduce your intake can lead to better focus, improved energy levels, and greater emotional well-being,” said health promotions specialist Dahlia-Leigh Cox.

She said on ingesting sugar, the sweetener triggers a dopamine rush, activating the brain’s reward system.

“Dopamine is the ‘feel-good’ neurotransmitter, and this creates a temporary sense of pleasure,” Cox said. “However, over time, your brain may become less sensitive, leading to cravings and a cycle of overconsumption.”

She said sugar also leads to energy highs and crashes, causing a spike in blood sugar levels, followed by a rapid drop, which can result in fatigue, irritability, and difficulty concentrating.

“It also impairs memory and learning, and high sugar intake over time has been linked to reduced brain-derived neurotrophic factor, a protein crucial for learning and memory,” she explained.

Not only that, Cox said excessive sugar consumption can contribute to inflammation, specifically inflammation in the brain, which has been associated with depression and neurodegenerative diseases like Alzheimer’s.

“Fluctuating blood sugar levels caused by high sugar intake can lead to mood swings, anxiety, and even symptoms of depression,” she added.

How can you cut back on sugar?

“Reducing sugar doesn’t mean giving up on flavour or enjoyment,” Cox said.

Here are practical strategies she said can help you cut back:

Read labels

• Check nutrition labels for added sugars in packaged foods. Look for terms like “high-fructose corn syrup”, “sucrose”, “dextrose”, or “molasses”.

• Aim to choose products with less than five grams of sugar per serving.

Rethink beverages

Replace sugary drinks like soda, energy drinks, and sweetened teas with:

• Water infused with fruit or herbs.

• Unsweetened herbal teas or coffee.

• Sparkling water with a splash of fresh citrus juice.

Choose whole foods

• Opt for fresh fruits instead of processed sweets. Natural sugars in fruits are balanced with fibre, which slows digestion and prevents blood sugar spikes.

• Swap processed snacks like candy or cookies for nuts, seeds, or air-popped popcorn.

Cook and bake at home

• Prepare meals and desserts at home to control the amount of sugar added.

• Use natural sweeteners like honey, maple syrup, or mashed bananas in moderation as alternatives.

Reduce gradually

If you’re used to sugary foods, start by gradually reducing sugar in your diet to avoid withdrawal symptoms. For example, cut the sugar in your coffee by half or mix sugary cereals with unsweetened ones.

Increase protein and healthy fats

Eating more protein and healthy fats can reduce sugar cravings by keeping you fuller longer. Try including eggs, avocados, nuts, or lean meats in your meals.

Snack smart

Reach for snacks like Greek yoghurt, hummus with veggies, or a handful of almonds instead of sugary granola bars or candy.

Be aware of hidden sugars

Sugar hides in unexpected places, like salad dressings, pasta sauces, and bread. Look for “no added sugar” versions or make your own at home.

“The benefits of cutting back on sugar include improved mental clarity, better mood and energy, reduced risk of disease, and healthier gut and brain,” Cox said. “Stable blood sugar levels reduce brain fog and improve focus and concentration. Fewer sugar crashes mean more consistent energy levels and a more stable mood, and lowering sugar intake reduces the risk of obesity, type 2 diabetes, and neurodegenerative diseases.”

She said while sugar in moderation is fine, excessive consumption can negatively affect your brain and body.

“By making simple swaps, increasing whole foods, and paying attention to hidden sugars, you can break the sugar habit and enjoy a healthier, more balanced lifestyle. Your brain—and the rest of your body—will thank you for it!”