Why diets don't work (and what to do instead)

Let me start with a number that might surprise you: research suggests that up to 95% of people who lose weight through dieting regain it within five years. Many end up heavier than when they started. This isn't a quirky statistic — it's a consistent finding across decades of research.

So if you've ever "failed" a diet — if you've lost weight only to gain it back, if you've started Monday's meal plan full of motivation only to abandon it by Wednesday — please know this: the problem was never you. The problem is the diet itself.

The biology of restriction

When you significantly reduce your calorie intake, your body doesn't simply burn fat and carry on. It panics. From an evolutionary perspective, your body can't distinguish between a calorie deficit from a diet and a calorie deficit from famine. So it activates a whole cascade of survival mechanisms:

• Increased ghrelin — the hunger hormone goes up, making you feel hungrier than usual
• Decreased leptin — the fullness hormone drops, so you don't feel satisfied even after eating
• Slower metabolism — your body becomes more efficient, burning fewer calories at rest
• Increased cortisol — the stress hormone rises, promoting fat storage (particularly around the middle)
• Heightened food focus — your brain literally becomes more preoccupied with food

This isn't weakness. This is your body doing exactly what it's designed to do: keeping you alive.

The psychology of restriction

Beyond the biological effects, dieting does a number on your mental health too. The restrict-binge cycle is well-documented in psychology:

You start a diet with high motivation. You follow the rules perfectly for a while. Then life happens — stress, a social event, a bad day — and you eat something "off-plan". Because the diet has framed certain foods as forbidden, eating them triggers guilt. That guilt often leads to a "sod it" mentality: "I've already ruined today, might as well eat everything." Which leads to overeating. Which leads to more guilt. Which leads to starting a new diet on Monday.

The restrict-binge cycle isn't a character flaw. It's a predictable psychological response to deprivation.

But what about health?

Here's where it gets nuanced. I'm not saying that nutrition doesn't matter, or that what you eat has no impact on your health. It absolutely does. What I'm saying is that the diet approach — rigid rules, severe restriction, willpower-based compliance — is not the way to achieve lasting health improvements.

The research is clear: sustainable, moderate changes to eating habits lead to better long-term health outcomes than dramatic short-term diets. Health-promoting behaviours (eating more vegetables, moving your body, managing stress, sleeping well) are beneficial regardless of whether they lead to weight loss.

So what actually works?

1. Focus on adding, not removing

Instead of thinking about what you need to cut out, think about what you can add in. More vegetables with dinner. A piece of fruit with your afternoon snack. A glass of water before your coffee. Adding nourishing foods naturally crowds out less nourishing ones, without the deprivation.

2. Reconnect with your hunger and fullness

Many of us have lost touch with these basic body signals after years of external eating rules. Start paying attention to how hunger shows up in your body, and what comfortable fullness feels like. This is a cornerstone of intuitive eating, and it's transformative.

3. Address the emotional side

So much of our eating is driven by emotions rather than physical hunger. Stress, boredom, loneliness, celebration — food is deeply connected to how we feel. Understanding these patterns (without judgement) is key to making lasting changes.

4. Find movement you enjoy

Exercise shouldn't be punishment for eating. Find ways to move your body that genuinely feel good — walking, swimming, dancing, yoga, whatever brings you joy. You're much more likely to stick with movement that you look forward to.

5. Get support

Undoing years of diet culture messaging is hard to do alone. Working with someone who understands the science and can provide personalised guidance makes a real difference. Whether that's a nutritional therapist, a counsellor, or even a supportive community — having someone in your corner matters.

A gentler path forward

If you're reading this and feeling a sense of relief — "it's not just me" — I want you to sit with that for a moment. You haven't failed. You've been set up to fail by an industry that profits from your repeated attempts.

There is another way. It's gentler, slower, and less dramatic than a diet. But it works. And it lasts.

If you'd like to explore what this looks like for you personally, I'd love to hear from you. My approach is evidence-based, compassionate, and completely free of diet culture. Let's have a chat.