Low-carb diet: a practical guide to eating fewer carbohydrates
Published on ·Updated on ·6 min read
<p>Low-carb eating has moved well beyond a passing trend. Millions of people worldwide have adopted it as a sustainable way to manage their weight, stabilise [blood sugar](/en/blog/normal-blood-sugar) and improve energy levels. But how does it actually work, what does the evidence say, and is it right for you?</p>
<h2>Key takeaways</h2>
<ul>
<li>A low-carb diet limits carbohydrate intake to 50–130 g per day, compared to the typical 250–300 g most people consume.</li>
<li>Lower carb intake reduces insulin spikes, which may help the body burn fat more efficiently.</li>
<li>It is more flexible and sustainable than a ketogenic diet, making it easier to maintain socially.</li>
<li>Evidence consistently shows benefits for weight loss, triglycerides and blood sugar regulation.</li>
<li>Vegetables, [protein sources](/en/blog/high-protein-foods) and healthy fats form the foundation; fruit and whole grains can be included in moderation.</li>
<li>Tracking your intake helps you stay within your carb targets without guesswork.</li>
</ul>
<h2>What is a low-carb diet?</h2>
<p>The average person in Europe consumes between 250 and 300 grams of carbohydrates per day. A low-carb diet brings that number down to 50–130 grams, depending on the approach. A moderate low-carb plan sits around 100–130 g; a stricter version drops to 50–100 g. Below 50 g per day, you enter ketogenic territory, where the body shifts to fat as its primary fuel — a more extreme and harder-to-sustain approach.</p>
<p>The key difference between low-carb and keto is flexibility. On a low-carb diet, you can still eat vegetables, some fruit, legumes and moderate amounts of whole grains. That makes it far more practical in social settings and reduces the risk of nutritional deficiencies that can occur with very restrictive approaches.</p>
<h2>How it works in the body</h2>
<p>Carbohydrates are broken down into glucose, which raises blood sugar. In response, the pancreas releases insulin. Insulin not only regulates blood sugar — it also promotes fat storage and suppresses fat burning. By reducing carbohydrate intake, you lower the insulin response after meals.</p>
<p>With less insulin circulating, the body finds it easier to access stored fat for energy. Blood sugar levels become more stable, which eliminates the familiar post-lunch energy slump that many people experience after a carb-heavy meal. Protein and fat — the macronutrients that replace carbs — are also more satiating, meaning you naturally feel fuller for longer.</p>
<h2>What to eat</h2>
<h3>Eat freely</h3>
<p>Non-starchy vegetables — broccoli, spinach, courgette, bell peppers, mushrooms, cucumber — form the backbone of a low-carb diet. They are low in carbs and high in fibre, vitamins and minerals. Meat, fish, eggs and full-fat dairy (cheese, Greek yoghurt, cottage cheese) are excellent protein sources with minimal carbs. Nuts, seeds and avocado provide healthy fats that promote satiety.</p>
<h3>Eat in moderation</h3>
<p>Berries (strawberries, raspberries, blueberries) are relatively low in sugar and fit well into a low-carb approach. Other fruits — bananas, mangoes, grapes — are higher in fructose and best eaten in smaller portions. Whole-grain products such as rye bread and oats have a lower glycaemic impact than white varieties and can be included in limited quantities.</p>
<h3>Limit or avoid</h3>
<p>White bread, white pasta, white rice, sugary drinks, fruit juices, sweets and most ultra-processed foods are the biggest carbohydrate sources. They digest quickly, cause blood sugar spikes and provide little satiety despite their caloric content.</p>
<h2>What the evidence shows</h2>
<p>Low-carb diets are among the most studied dietary strategies in nutrition science. A 2020 meta-analysis published in <em>The BMJ</em> found that low-glycaemic and low-carbohydrate diets produced greater short-term weight loss than low-fat diets. At twelve months and beyond, differences between diet types narrow, but the effect remains meaningful for many individuals.</p>
<p>Consistent findings across multiple trials include: reduced triglycerides, increased HDL ("good") [cholesterol](/en/blog/foods-to-lower-cholesterol), lower blood pressure and improved blood sugar regulation. A 2019 study in <em>Diabetes Care</em> found that participants with type 2 diabetes on a low-carb diet required significantly less medication after six months compared to a standard diet group.</p>
<p>One important caveat: most studies are under two years in duration. Long-term evidence beyond that point is more limited, which is worth keeping in mind — particularly for stricter variants of the diet.</p>
<h2>Benefits in practice</h2>
<p>More stable energy is the most immediate benefit that people report. Without the blood sugar rollercoaster of high-carb eating, energy stays more consistent through the afternoon. The mid-afternoon slump that many people assume is normal often disappears within a few weeks of reducing carbohydrates.</p>
<p>Appetite control improves significantly for most people. Protein and fat trigger satiety hormones more effectively than carbohydrates, which means you eat less without consciously restricting yourself. Many people find that the urge to snack between meals decreases substantially.</p>
<p>Weight loss tends to start quickly on a low-carb diet. The initial weeks involve some water loss as glycogen stores deplete, but fat loss follows. Research consistently shows that low-carb approaches produce competitive or superior weight loss results compared to low-fat diets over periods of six to twelve months. You can read more about structuring your intake in our guide on <a href="/en/blog/calorie-deficit-calculator">calculating a calorie deficit</a>.</p>
<h2>Potential drawbacks</h2>
<p>The first one to two weeks can feel rough. Headaches, fatigue and irritability — sometimes called the "low-carb flu" — are common as the body adapts to using less glucose. Staying well hydrated and ensuring adequate sodium, potassium and magnesium intake helps shorten this adjustment period significantly.</p>
<p>Fibre intake requires attention. Whole grains and legumes, two major fibre sources, are limited on a low-carb diet. Prioritising non-starchy vegetables and including seeds such as flaxseed or chia helps maintain digestive health. Tracking your fibre alongside carbs is useful — see our article on <a href="/en/blog/calorie-tracking-beginners-guide">calorie tracking for beginners</a> for practical tips on how to do this.</p>
<p>Social situations are a genuine challenge. Restaurant menus, family dinners and celebrations often centre on bread, pasta or rice. A flexible mindset — accepting that occasional higher-carb meals are not a failure — makes the diet far more sustainable in the long run.</p>
<h2>How to get started</h2>
<p>Before changing what you eat, spend two or three days tracking what you currently eat. Most people significantly underestimate how many carbohydrates they consume. Seeing the numbers makes it much easier to identify the biggest sources and prioritise what to change first.</p>
<p>Swap the largest carbohydrate sources gradually. Replace white bread with a smaller portion of rye bread or a salad. Trade pasta for a smaller serving of whole-grain pasta with more vegetables, or try courgette noodles. Switch sugary breakfast cereals for Greek yoghurt with berries and nuts.</p>
<p>Moveno's food recognition technology lets you photograph a meal and see the full nutritional breakdown — including carbohydrates — in seconds. This is particularly helpful for mixed dishes and restaurant meals where you cannot weigh individual ingredients. It removes the friction from tracking and helps you stay consistent. Also see our article on the <a href="/en/blog/mediterranean-diet">Mediterranean diet</a> as a reference for balanced, evidence-based eating.</p>
<h2>Who is it right for?</h2>
<p>A low-carb diet works particularly well for people who experience blood sugar instability, struggle with hunger on low-fat diets, or want a structured framework for reducing processed food and refined sugar. It is also a well-supported dietary approach for people managing type 2 diabetes or metabolic syndrome, ideally in combination with medical supervision.</p>
<p>People with kidney disease, certain metabolic conditions or a history of eating disorders should consult a doctor or registered dietitian before making significant dietary changes. Pregnant and breastfeeding women should also approach carbohydrate restriction cautiously and with professional guidance.</p>
<p>The best diet is always the one you can actually maintain. A low-carb approach that you follow consistently for six months will deliver far better results than a strict ketogenic protocol you abandon after three weeks.</p>
<h2>Sources</h2>
<ul>
<li>Ebbeling CB et al. (2020). Effects of a low carbohydrate diet on energy expenditure. <em>The BMJ</em>. <a href="https://www.bmj.com/content/363/bmj.k4583">bmj.com</a></li>
<li>Sainsbury E et al. (2019). Effect of dietary carbohydrate restriction on glycemic control in adults with diabetes. <em>Diabetes Care</em>. <a href="https://diabetesjournals.org/care/article/42/12/2360/36294">diabetesjournals.org</a></li>
<li>Voedingscentrum (2024). Koolhydraten. <a href="https://www.voedingscentrum.nl/encyclopedie/koolhydraten.aspx">voedingscentrum.nl</a></li>
<li>Gezondheidsraad (2022). Richtlijnen goede voeding. <a href="https://www.gezondheidsraad.nl">gezondheidsraad.nl</a></li>
</ul>
