Why Is It So Hard for People with Diabetes to Stick to a Healthy Diet?

Why is it so hard for some people with diabetes to stick to a healthy diet?

Why doesn’t knowing what they should eat automatically change what they eat?

Why can someone really want to be healthier yet still reach for cookies they know they shouldn’t?

And why is it that sometimes…

It’s not because they don’t care about their health…

It’s because their brain is trying to solve a different problem?

THE STORY

He meant it this time.

The diagnosis scared him.

His blood sugar was high.

His doctor talked about risks.

He promised himself he was going to change his ways.

For a few days… he did.

He avoided sweets.

Read labels.

Made healthy choices.

Then life happened.

Work was stressful.

He argued with his wife.

It was a long night.

He opened up the cupboard and grabbed a cookie.

Not because he forgot he was diabetic.

Not because he wanted to make himself sick.

But because, in that moment… his brain wanted comfort more than it wanted health.

That night he sat on the couch and thought:

“Why do I keep doing this?”

WHAT’S REALLY HAPPENING

Living with diabetes isn’t just about trying to keep blood sugar controlled. It’s about changing habits. And some of the hardest things we do involve changing habits in our brain.

Knowing what to eat and actually eating that way every day are two very different things.

INSIDE THE MIND: WHAT’S HAPPENING UNDERNEATH

Food isn’t just fuel for our body.

For many people… food is comfort.

Celebration.

Stress relief.

Reward after a long day.

A way to connect with family.

Decades of routine.

When our emotions become linked to food… changing your diet suddenly isn’t JUST about changing what you eat. It becomes about changing how you deal with life.

WHAT YOUR BRAIN IS DOING

Your brain is wired to seek pleasure and avoid pain.

Highly palatable comfort foods – including many foods high in sugar and refined carbohydrates – can activate your brain’s reward system quickly.

They give you immediate satisfaction.

When you’re stressed… or tired… or lonely… or overwhelmed… your brain recalls the things that made you feel better in the past.

It isn’t focused on your blood sugar next week.

Your brain just wants you to feel good RIGHT NOW.

THE SCIENCE BEHIND IT

Our brains are wired to care more about what happens now than what will happen in the future.

And that’s what is called present bias.

That’s why the pleasure of eating something tasty today can feel much more important than potential health issues down the road.

And because habits are actions we repeat automatically… the more you repeat a behaviour… the less your brain has to think about it.

They become automatic.

That’s why changing habits can be so difficult. It takes time, patience and repetition.

REAL LIFE

This is why even someone with diabetes may:

Make a promise to eat better tomorrow.

Stick to their diet for days.

Get overwhelmed by stress… and reach for junk food.

Feel guilty.

Repeat.

Sound familiar?

On the outside… we often look like we just don’t have enough self-control.

But on the inside… we’re often battling a brain that wants to fall back on decades of habits.

THE TRUTH

Many people with diabetes already have a good idea of what they should be eating.

The problem often isn’t knowledge alone. And it isn’t simply about willpower.

The real challenge is breaking habits that our brains have practiced for years. And that doesn’t happen overnight.

THE SHIFT

Rather than beating yourself up with:

“Why don’t I have more willpower?”…

Ask yourself:

“What am I trying to comfort with food?”

Am I actually hungry? Or am I…

Stressed?

Bored?

Lonely?

Tired?

Understanding your brain’s true motive allows you to start finding other ways to fulfil that need.

WHAT YOU CAN DO

Stop beating yourself up about not being perfect.

Focus on being consistent.

Make one small change at a time.

Plan ahead before you’re hungry.

Stock your home with healthy foods that are easy to grab.

And if you make an unhealthy food choice…

Don’t view it as a setback.

View it as a learning experience.

Ask yourself:

“What happened right before I made that decision?”

Figure out your triggers.

Each time you do… you learn more about your habits.

HOPE

A diabetes diagnosis doesn’t mean you failed.

And if you have bad days with food… that doesn’t mean you’re a bad person with no willpower.

It means YOU are human. Trying to change eating habits your brain has reinforced for years.

The good news? The same brain that learned those habits can learn new ones.

One meal at a time.

One choice at a time.

One day at a time.

Because you WILL build those new habits but not by trying to be perfect.

By making each choice just a little better than the last.

Dr. Jassam is a practicing medical doctor in Canada with additional qualifications and extended training in psychiatry. He holds a postgraduate diploma in psychiatry from the Royal College of Physicians of Ireland and a master’s degree from the University of Melbourne. He is also the author of several books on ADHD, panic disorder, burnout, and other mental health topics. His writing combines medical evidence, psychiatric knowledge, and clinical experience.