June 2026

Pros and Cons - Calorie vs Carbs Counting

Keeping the balance between energy in and energy out sounds like simple maths. We've all heard that "weight loss is as simple as making sure calories out exceeds calories in."

But if it were really that straightforward, why is it so hard for so many people to lose weight and keep it off? Clearly, there's more at work than just the numbers.

A Note Before We Start

I'll be honest: I'm not a huge fan of counting anything when it comes to food and health. What I am keen to encourage is a balanced, sustainable relationship with food, one where you can eventually:

Eat when you're genuinely hungry
Eat the rainbow
Prioritise protein
Minimise processed foods
Move your body enough
Have a strong sense of what works for you

That said, sleeve gastrectomy and gastric bypass patients do need a more prescriptive approach, particularly early in the journey. This ensures you're getting the nutrition you need, and that the weight you lose comes from fat rather than muscle. So in this situation, monitoring things more closely genuinely helps, and balancing your carbs, proteins and fats supports steady energy and keeps you on track toward your goals.

So let's look at the two most common approaches, and the pros and cons of each.

Calorie Counting

If you count calories, the principle is to aim for an energy deficit. As a rough guide, a deficit of around 3,500 calories equates to roughly 450 grams of body fat, so cutting about 500 calories a day could equate to around 450 grams of loss per week.

Pros:

It's easy to read a nutritional label and see how much of your daily allowance a meal uses
A balanced, calorie-aware approach can support overall health and wellbeing

Cons:

It only accounts for the quantity of calories, not their nutritional quality
Cutting calories too low (generally below 1,200–1,500 per day) can backfire - potentially causing stalls or making it harder to lose fat

Carbohydrate Counting

Carb counting means tracking the grams of carbohydrate in your meals and snacks, setting a daily target, and staying mindful not to exceed it. Choosing complex carbs over simple ones is the general approach.

For example, if you decided 45% of an 1,800-calorie day should come from carbs, that's around 810 calories (roughly 202g) portioned across your meals.

Pros:

Helpful for those who prefer to keep a closer eye on their carbohydrate intake
Nutritional labels make it easy to track carb content toward your target

Cons:

Not all foods contain carbs - a steak has none but is high in fat and calories, so carb counting alone doesn't guarantee a balanced diet
Portion control still matters, since carb counting doesn't account for total energy intake

For reference, these foods each contain roughly 15g of carbohydrate: one slice of wholegrain bread, one small piece of fruit, ½ cup fresh fruit, ½ cup starchy vegetables, ⅓ cup pasta, or ⅓ cup rice.

So Which Is Better?

Honestly? The best approach is a balanced, varied, whole-food diet, and how you get there is a personal choice best guided by your professional team. They can help you move toward your goals in a healthy way, and troubleshoot stalls or plateaus by spotting where the balance is off.

A couple of things worth remembering either way:

A calorie isn't always "just a calorie." A glass of wine and a banana may contain similar calories, but only one moves you toward better health. Quality matters as much as quantity.

Counting can become a distraction. Both methods demand attention to detail, which is exactly why I encourage shifting toward intuitive eating as your journey progresses, so you're not stuck in a restrictive "dieting mentality."

Beyond the Numbers

Whichever method you choose, pair it with portion control plates and bowls, and work on developing your "listening skills" so you can tune into what your body genuinely needs at any given time.

The real goal is a healthy relationship with food - understanding its role in fuelling your body, and making it less about reward, distraction or emotion. If that doesn't come naturally, work with a professional who can support you. There's no shame in needing guidance; most of us were never taught this in the first place.

Track what matters to you , your energy, your wellbeing, how your body feels, and let that guide you as much as any number on a label.

Always work with your surgical and healthcare team to find the approach that's right for your individual situation.

Jacqui Lewis
BHSc Nutritional and Dietetic Medicine