Carbohydrates and Weight Loss
I've Eaten a High-Carb Diet My Whole Life and Always Maintained a Healthy Weight. Here's Why That's Not a Contradiction.
There is an enormous amount of confusion about carbohydrates and weight loss. Social media is full of people telling you to cut carbs, avoid bread, go keto. I understand why people are confused. But I want to be clear about where I stand on this, because it's something I feel strongly about.
Carbohydrates do not inherently cause weight gain. You can gain weight eating too much of any macronutrient. But you can absolutely lose fat and maintain a healthy weight eating a high-carbohydrate diet, provided you're eating the right type of carbohydrates. I'm living proof of that. I've eaten a high-carb Mediterranean diet my entire life and I've maintained a healthy body composition throughout. I'm leaner now in my 50s than I was at 30.
Carbs rarely turn into body fat. Here's what actually happens.
Here's something that surprises a lot of people. Carbohydrates very rarely get converted directly into body fat.
When you eat carbs, your body burns them for energy first. Whatever isn't used immediately gets stored as glycogen in your muscles and liver, ready for your next workout or your next few hours of activity.
The process of actually turning carbohydrate into fat, called de novo lipogenesis, is a minor pathway in the body and only becomes significant when someone is eating a genuine calorie surplus with a very high carbohydrate load over consecutive days. For most people eating normally, it's barely a factor.
Where carbs do contribute to fat gain is more indirect than people realise. Your body always burns carbohydrate for fuel before it burns fat. So if you eat a high-carb meal alongside a high-fat one, your body burns the carbs first and quietly stores the fat instead, simply because it didn't need to burn it in that moment.
The body's clear preference is to store dietary fat as body fat before it ever resorts to converting carbohydrate into fat. That's the real mechanism. It's not that carbs turn into fat on your body. It's that eating too many carbs and too much fat together, above what you need, means the fat you ate gets stored while the carbs get used or stockpiled as glycogen.
The real question: Refined or unrefined?
I used to think of it simply as complex carbohydrates being good and simple carbohydrates being bad. But it's more nuanced than that. The real distinction is between refined and unrefined carbohydrates.
When you picture a field of rice, rows of wheat, fresh fruit hanging from trees, you're looking at plant foods as nature intended. These are unrefined carbohydrates. The problem begins when food manufacturers process and refine those foods. In that process, most of the fibre gets stripped out along with a significant amount of the nutrition.
Refined and processed carbohydrates are generally poor in fibre, low in nutritional value, calorie-dense, and easy to overconsume because they digest quickly and don't keep you satisfied. Eat enough of them above your daily calorie needs, and yes, you will gain weight.
Refined carbohydrates to minimise
When trying to lose weight and body fat, it makes sense to minimise or avoid these processed and refined carbohydrates:
- White bread
- White flour pasta
- White rice
- Refined and sugary breakfast cereals
- Soft drinks (soda)
- Cakes, biscuits, and crackers
- Potato chips
- Confectionery
Unrefined carbohydrates to fill up on
On the other hand, unrefined carbohydrates from whole plant foods are nutrient-rich, high in fibre and water, lower in calories, and keep you feeling full for longer. These are what I eat every day:
- Vegetables, especially dark leafy greens and root vegetables
- Fruits
- Whole grains: whole-grain pasta, bread, oats, brown rice, quinoa
- Legumes: lentils, chickpeas, beans
- Nuts (a small handful a day is plenty)
I like to use an analogy that I think makes this really clear. Think of your body as a wood burner you use for heat in winter. Your fuel choice is either paper, the refined carbohydrates, or logs, the unrefined carbohydrates. Throw paper on the fire and you get a big burst of flame, then nothing. Throw on the logs and you get steady, sustained heat for hours. Unrefined carbohydrates are the logs. They provide longer-lasting fuel.
Try whole-grain versions
Swapping white bread, pasta, and rice for their whole-grain versions is one of the simplest and most effective changes you can make. Whole-grain options retain most of their fibre, which makes them more filling and nutritious than their white counterparts. The adjustment takes a week or two to get used to, and then it just becomes normal.
My personal experience
Ever since I can remember, my diet has consisted of far more unrefined carbohydrates than refined ones. I grew up in an Italian household with a backyard vegetable garden. Whole-grain pasta, legumes, vegetables, and fruit were always the foundation of what we ate. I've maintained a healthy weight my entire life eating this way.
Who said a high-carbohydrate diet is unsuitable for losing body fat or managing weight? You just need to eat the right types of carbohydrates. Eating unrefined foods from whole-food sources is the key.
Precision Nutrition: All about carbohydrates →
Health should feel like your best life, not a break from it.
Marco ☕
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About Me I'm Marco Asnicar, personal trainer, nutrition coach and founder of Vitality Marco. I didn't discover the Mediterranean method. I grew up living it, shaped by Italian roots, real food and movement as a natural part of daily life. I coach men and women aged 35 to 55 to do the same. No restriction. No fads. No giving up the life you love. Just a way of eating and living that genuinely feels good and gets better every year. Want to know more about my story and approach? Read my full About Me page → |