You can eat
- Legumes such as lentils, chickpeas, beans or peas, at least four times a week [1].
- Vegetables at lunch and dinner, at least 150–200 g raw at each meal.
- Seasonal whole fruit, two or three pieces a day
- White and oily fish, seafood, and lean meat such as chicken, turkey or rabbit.
- Eggs, boiled, in an omelette, scrambled or grilled
- Plain yoghurt with no added sugar and semi-skimmed milk
- Oats, wholemeal bread, brown rice, wholewheat pasta and couscous, quinoa, potatoes and sweet potatoes.
- Nuts, raw or roasted: 2 or 3 walnuts, or the same amount of other nuts .
- Extra virgin olive oil, 1 to 1.5 tablespoons per serving for a one-course meal .
- Water, homemade broths, herbal teas and vegetable soups
What to avoid
- Soft drinks, juices, energy drinks and sugary shakes
- Pastries, biscuits and sugary breakfast cereals
- Ready meals, salty snacks and fast food
- Fatty processed meats and other processed meat
- Alcohol, including beer or wine with meals
- Fried foods and bottled sauces as everyday staples
- Sugary yoghurts and dairy desserts, even if labelled “0%”
- Shakes, pills or teas that promise weight loss
Changes that help
Drinks
Instead of a soft drink or juice, have water, sparkling water or an herbal tea, because calories in drinks do little to fill you up.
Breakfast
Instead of biscuits or sugary cereal, have oats with plain yoghurt and chopped fruit, because the fibre and protein help keep you going until mid-morning.
Side dish
Instead of chips, have skin-on potatoes or sweet potatoes baked in the oven, because you keep the carbohydrate without the frying oil.
Habits that help
- Eat seated at the table without screens, so you can notice when you have had enough.
- Move every day and add two strength-training sessions a week to preserve muscle while losing fat .
- Shop with a list and keep the foods you want to eat where you can see them.
“What should I eat to lose weight?” is one of the first questions people bring to a consultation. It almost always comes with a list of things they have already cut out: bread, fruit at night, bananas, dinner.
We start with the opposite: deciding what to put on your plate so it fills you up, nourishes you and helps you reach your next meal feeling less hungry.
Are there foods that make you lose weight?
No. No food makes you lose weight on its own—not pineapple, artichoke or green tea. Losing fat means eating somewhat less than you expend, moderately and over several months, without crash plans [2].
What does vary from one food to another is how filling it is for each calorie. This is its energy density: the calories in each bite. A plate of lentils with vegetables takes up a lot of space and provides relatively little energy; a croissant takes up little space and provides a lot.
With low-energy-density foods, you can eat a normal-sized plate and reduce your daily calorie intake without feeling hungry [3].
In a trial involving inpatients who could eat as much as they wanted, the ultra-processed diet was associated with about 500 kcal more per day than the unprocessed diet [4]. In that study, participants ate faster; the result does not mean that all these products have the same effect.
No food makes you lose weight. What helps is a plate that fills you up with fewer calories.
9 foods that help you eat less without going hungry
1. Legumes
Lentils, chickpeas, beans and peas provide protein and fibre at the same time, and with vegetables they make a filling, complete meal. They are also inexpensive, keep for months and can be prepared in many ways.
Cook them with vegetables instead of chorizo, add them to a salad or make hummus to spread. If they give you gas, start with small portions and try red lentils or mashed chickpeas. You can find more ideas in the guide to legumes: benefits, portions and how to digest them more easily.
2. Vegetables
They usually add plenty of volume and fibre to a meal. AESAN recommends at least three daily servings of vegetables and two or three of fruit [1].
Starting with a salad, soup or vegetable dish may help you feel full, although it does not necessarily reduce how much you eat afterwards [3]. Try different cooking methods and spices to find preparations you enjoy.
3. Whole fruit
You can eat fruit at any time, including at night, and bananas are another option. In observational studies, eating more fruit and vegetables has been associated with less weight gain over the years [5]; this does not mean they cause weight loss on their own.
A serving of fruit is about 150 to 200 g: one apple, one banana, two kiwis, two mandarins or three plums . Whole fruit is better than juice. You have to chew it, it retains its fibre and it is more filling.
4. Fish and lean meat
Protein may help you feel full and, together with strength training, help preserve muscle during weight loss [6]. You can spread protein foods across your meals according to your needs and preferences.
Alternate white and oily fish, seafood and lean meats such as chicken, turkey or rabbit. AESAN recommends at least three servings of fish a week, prioritising oily fish. You can grill it, bake it or cook it en papillote.
5. Eggs
They are high-quality protein, inexpensive and ready in five minutes. An egg at breakfast or a French-style omelette at dinner provides the protein for your meal when you do not have time to cook.
6. Plain yoghurt and milk
Fear of getting hungry between meals is one of the most common concerns. Plain yoghurt with no added sugar is a filling snack that helps you make it to your next meal without grazing. If you are hungrier, add chopped fruit or a few nuts.
A glass of hot semi-skimmed milk with cinnamon in the afternoon can also make a good snack . If you drink a plant-based beverage, choose one with no added sugar and at least 3% protein , as stated on the label.
7. Oats and whole grains
Carbohydrates do not need to be removed to lose weight. Every main meal includes a source of carbohydrates, and whole-grain options provide more fibre. Eating more fibre and whole grains is associated with a slightly lower body weight [7].
A rough serving guide for pasta, rice, quinoa or couscous is 40 g uncooked when served with a protein, and 70 g when the dish does not include one .
Potatoes and sweet potatoes are also sources of carbohydrates. Oats can be used for breakfast and also to thicken soups or prepare doughs. Find more ideas in high-fibre foods.
8. Nuts in an appropriate portion
They contain a lot of calories in a small volume, and yet trials do not find that eating them leads to weight gain [8]. They provide mostly unsaturated fats and go well with a piece of fruit as a snack.
The trick is the portion. Choose them raw or roasted, not fried and with no added salt, and serve them before sitting down to eat rather than eating straight from the packet.
9. Water, broths and vegetable soups
Water quenches thirst without adding anything and takes the place of soft drinks or juice. Reducing free sugars helps prevent unhealthy weight gain [9], and soft drinks and juices make it very easy to consume them without noticing.
Keep water within reach and drink according to your thirst and circumstances. Broths and vegetable soups also provide fluid.
How to put them together in a day
These nine foods work together, not one at a time. The simplest approach is the plate method, based on the Harvard plate [10]. We suggest it this way: half the plate vegetables; one quarter protein; and the other quarter carbohydrates, preferably wholegrain. For dessert, have fruit or yoghurt.

Olive oil counts too: if you prepare a second course with salad, one dessert spoon per serving is a rough guide.
Here is an example of a day that works:
- Breakfast: plain yoghurt with oats and chopped fruit, or wholemeal toast with tomato and scrambled egg.
- Lunch: courgette soup and oven-baked hake with potato.
- Snack: a piece of fruit with two or three walnuts.
- Dinner: mixed salad and a French-style omelette with wholemeal bread.
If you want a whole week planned out, see the 7-day weight-loss meal plan with a shopping list. And in how to reduce calories without going hungry, you can learn how to make the dishes you already cook lighter.
What mistakes do we see in consultations?
They happen so often that we can almost guess them before the person sits down:
- Cutting out fruit at night or bananas. No fruit causes weight gain; what gets cut out often comes back as snacking.
- Having dinner without carbohydrates. You wake up hungry the next day and breakfast gets out of hand.
- Eating handfuls of nuts because they are healthy. They are, which is why they have a serving size.
- Trusting “0%” or “light” labels. Many such yoghurts and desserts contain sugar; check the ingredient list.
- Relying on a single food. Pineapple, artichoke, cucumber or green smoothies do not change your weight on their own. Never base your diet on just one or a few foods.
If you eat this way and the scales do not budge
It happens more often than you might think. If you monitor your weight, weigh yourself no more than once a week. Measuring your waist and hips or using a belt you regularly wear may give you a better guide than the scales. Portions, unrecorded snacking, sleep, stress, the menstrual cycle or some medicines can make it harder. Very restrictive diets are difficult to maintain and make weight regain more likely [2]. And following one restrictive diet after another can make your body use somewhat less energy .
Losing weight on your own is difficult, and it is not a lack of willpower. In the guide why am I not losing weight? we review the most common causes, and in the weight-loss diet guide you will find the complete plan, including the rate of weight loss we recommend.
If you would rather have the week planned on paper, download the free “Weekly meal plan to lose weight without going hungry” guide, with all seven days and the shopping list.
The plate idea comes from Harvard University’s Healthy Eating Plate, which you can print and keep in your kitchen.
And if you have been trying for a while without results, or food causes you more distress than motivation, it makes sense to have someone look at it with you. Our weight loss dietitian-nutritionists work from your nutritional assessment, in Barcelona and online.
We explain it on video
Your first step this week
Make legumes the main course twice
Choose two meals this week and make lentils or chickpeas stewed with vegetables the main course. They are filling, and you do not have to count anything.

Your week of meals, ready for the fridge
- 7-day menu with the shopping list
- 8 recipes: cook once, eat twice
- What to do when the week goes off track
Where should we send it?
Free PDF, in your inbox in a moment.
Data controller: Alimmenta Tu Vida, S.L. Purpose: to send you the guide and, only if you tick the second box, tips by email on the topic. You can withdraw your consent and exercise your rights at [email protected]. Legal basis, recipients and retention periods are in our privacy policy.
When to see a doctor
When to see a doctor
Through nutrition and habit changes, we can help you lose fat while preserving muscle and maintain that change over time. What we cannot do is find out why your weight is changing for no apparent reason: if you lose or gain weight without trying to, your doctor should assess it before you change your diet.
Seek medical attention without waiting to change your diet if you notice any of these signs:
- You faint, feel dizzy when standing up or notice palpitations while following a very low-calorie diet [11].
- You lose weight without trying and have not changed your diet or usual activity [12].
- You are very thirsty, urinate frequently and lose weight at the same time [13]
- Your period has stopped or become irregular since you lost weight [11]
- You feel that you lose control around food, or compensate for what you eat by vomiting, using laxatives or exercising [11].
- If your legs or face swell over a few days and you become short of breath, seek urgent medical attention [14].
If you faint, have chest pain or your heart races, seek emergency care today. If you lose weight without trying, are very thirsty and urinate frequently, or your period has stopped, make an appointment with your GP this week.
If you feel dizzy when standing up while following a very low-calorie diet, stop the diet and make an appointment with your GP this week. If your legs or face swell and you become short of breath, seek urgent medical attention. If you notice another change that limits your day-to-day life, see a doctor as soon as possible. If your difficulty is related to food rather than weight, specialist psychology support is available: seek that help before starting a diet, not afterwards.
Gradual weight loss without unpleasant surprises is the norm. These signs are uncommon; knowing how to recognise them is what allows you to stop monitoring for them.

Start with a first appointment, without a diet in between
Tell us what you have tried and what has not worked. We will tell you whether this consultation is right for you, with whom and in which format —in person or online—, and you can decide without pressure.---
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Sources
- López García E, Bretón Lesmes I, Díaz Perales A, et al. Informe del Comité Científico de la Agencia Española de Seguridad Alimentaria y Nutrición (AESAN) sobre recomendaciones dietéticas sostenibles y recomendaciones de actividad física para la población española. Revista del Comité Científico de la AESAN. 2022;(36):11-70. https://dialnet.unirioja.es/servlet/articulo?codigo=8783742
- National Institute for Health and Care Excellence. Overweight and obesity management. NICE guideline NG246. London: NICE; 2025. https://www.nice.org.uk/guidance/ng246
- Rolls BJ. Dietary energy density: applying behavioural science to weight management. Nutr Bull. 2017;42(3):246-253. doi:10.1111/nbu.12280
- Hall KD, Ayuketah A, Brychta R, et al. Ultra-processed diets cause excess calorie intake and weight gain: an inpatient randomized controlled trial of ad libitum food intake. Cell Metab. 2019;30(1):67-77.e3. doi:10.1016/j.cmet.2019.05.008
- Dreher ML, Ford NA. A comprehensive critical assessment of increased fruit and vegetable intake on weight loss in women. Nutrients. 2020;12(7):1919. doi:10.3390/nu12071919
- Moon J, Koh G. Clinical evidence and mechanisms of high-protein diet-induced weight loss. J Obes Metab Syndr. 2020;29(3):166-173. doi:10.7570/jomes20028
- Reynolds A, Mann J, Cummings J, et al. Carbohydrate quality and human health: a series of systematic reviews and meta-analyses. Lancet. 2019;393(10170):434-445. doi:10.1016/S0140-6736(18)31809-9
- Guarneiri LL, Cooper JA. Intake of nuts or nut products does not lead to weight gain, independent of dietary substitution instructions: a systematic review and meta-analysis of randomized trials. Adv Nutr. 2021;12(2):384-401. doi:10.1093/advances/nmaa113
- Organización Mundial de la Salud. Guideline: sugars intake for adults and children. Geneva: OMS; 2015. https://www.who.int/publications/i/item/9789241549028
- Harvard T.H. Chan School of Public Health. El Plato para Comer Saludable. Boston: Harvard T.H. Chan School of Public Health; 2011. https://nutritionsource.hsph.harvard.edu/healthy-eating-plate/translations/spanish/
- National Institute for Health and Care Excellence. Eating disorders: recognition and treatment. NICE guideline NG69. London: NICE; 2017, updated en 2020. https://www.nice.org.uk/guidance/ng69
- National Institute for Health and Care Excellence. Suspected cancer: recognition and referral. NICE guideline NG12. London: NICE; 2015, con actualizaciones posteriores. https://www.nice.org.uk/guidance/ng12
- American Diabetes Association Professional Practice Committee. 2. Diagnosis and classification of diabetes: Standards of Care in Diabetes—2026. Diabetes Care. 2026;49(Supl. 1):S27-S49. doi:10.2337/dc26-S002
- Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney Int. 2024;105(4S):S117-S314. doi:10.1016/j.kint.2023.10.018
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