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Healthy Eating Guide: Habits, Myths and the Role of Hydration in Your Diet

Healthy eating is often associated with lists of forbidden foods and rigid diets when, in reality, it is the opposite. It is about building a balanced, sustainable relationship with food that lasts over time. The purpose of eating well is not to achieve nutritional perfection at every meal. It is to create habits that support energy and well-being in the long term.

This guide brings together the essentials of healthy eating: what it looks like in practice, which foods also contribute to your daily hydration, some of the most common myths about popular diets, and how to build a balanced eating routine.

What does healthy eating look like in practice?

In Portugal, the official reference for a balanced diet is the Food Wheel (Roda dos Alimentos), promoted by the National Programme for the Promotion of Healthy Eating of the Directorate-General of Health. The model groups foods into seven groups, each shown at a size proportional to the recommended daily amount, with an emphasis on the regular consumption of fruit, vegetables, cereals and pulses.

Alongside the Food Wheel, the same programme points to the Mediterranean Diet as a complete and balanced eating pattern. It is based on olive oil as the main source of fat, regular consumption of fish, and fresh, seasonal plant foods. Neither of these models relies on extreme restriction: both favour balance between food groups across the day and the week.

Healthy eating plate with fish, sautéed vegetables, quinoa and chickpeas, with olive oil on the side

It makes sense to pay attention to these principles: according to the Directorate-General of Health (DGS), among dietary habits, low consumption of wholegrain cereals, high consumption of red meat and high consumption of processed meat stand out as the three main factors contributing to the loss of healthy life years in Portugal. Adjusting these three specific points is already a significant step forward, without requiring a radical change to your whole eating pattern.

Glass of water with ice surrounded by watermelon, cucumber, orange, strawberries and celery

Foods that help (or hinder) hydration

Hydration does not depend only on what you drink. A significant share of the water consumed each day comes from food itself, especially fruit and vegetables, which have a high water content. A peer-reviewed scientific study published in the PubMed Central database compared populations in the United Kingdom and France. It concluded that food can account for between roughly 27% and 36% of total water intake, depending on each country’s dietary patterns.

On the other hand, some foods and drinks have the opposite effect. Coffee, tea and other caffeinated drinks have a mild diuretic action, and highly processed or salty foods can increase the body’s need for water. None of these needs to be cut out. Still, it is worth being aware of their role in the equation of daily hydration, especially on hotter days.

This relationship also reinforces the importance of the water you drink directly throughout the day. Just as with food, the more pleasant the experience of drinking water, whether because of its quality or simply out of habit, the easier it becomes to maintain that balance.

Myths and facts about popular diets

One of the most persistent myths is that eating healthily requires a restrictive or monotonous diet. The Directorate-General of Health itself contradicts this idea: “having healthy eating habits does not mean following a restrictive or monotonous diet. On the contrary, one of the fundamental pillars of healthy eating is variety.”

This means there is no need to completely cut out the less healthy foods you enjoy. What distinguishes a balanced diet from an unbalanced one is not the occasional presence of these foods, but their frequency. They should be the exception, not the rule, over the course of the week.

Mindful eating in everyday life

Mindful eating means paying real attention to what you eat, without distractions such as your mobile phone or the television. It also means recognising your body’s own hunger and fullness signals. This simple practice helps you avoid overeating and turns meals into a more enjoyable experience, rather than an automatic act.

Small gestures help build this habit: chewing slowly, pausing between mouthfuls, and serving smaller portions. You can always have a second helping if you are still genuinely hungry. None of these practices requires constant willpower, just repetition over time.

How to build a balanced eating routine

Once you understand the general principles, your day-to-day eating routine benefits from a few simple practices:

  • Have a balanced breakfast, with fruit, cereals and a source of protein
  • Spread your meals throughout the day, avoiding long periods without eating
  • Include fruit and vegetables in most main meals
  • Drink water throughout the day, including around mealtimes, and not only when you feel thirsty
  • Save less balanced foods for occasional moments, without any associated guilt

As with hydration, consistency in these small habits matters more than perfection at every individual meal.

Frequently asked questions about healthy eating

Do you need to completely cut out less healthy foods?

No. According to the Directorate-General of Health, what matters is that these foods are the exception, not the rule, within an overall varied and balanced diet.

Fruit contains a lot of sugar, so does it make you put on weight?

The sugar in fruit comes with fibre, water, vitamins and minerals. This sets its impact on the body apart from that of the added sugar in processed products. Fruit is part of the base of the Food Wheel precisely because of its nutritional value.

Can food replace the water you drink?

Not entirely, but it makes a significant contribution. Scientific studies indicate that food can account for between roughly a quarter and a third of total daily hydration, mainly through fruit and vegetables.

Is healthy eating possible without following a restrictive diet?

Yes. That is precisely the principle upheld by the official Portuguese recommendations: variety and balance, not restriction, are the foundation of sustainable healthy eating.

How many meals a day should you have?

There is no fixed, mandatory number. What matters most is regularity: avoiding very long periods without eating. That way, you do not arrive at your next meal excessively hungry, which tends to encourage less balanced food choices.

In short

Healthy eating is not about lists of forbidden foods, but about a sustainable balance between variety, moderation and hydration. Small adjustments to your daily routine, kept up consistently, are worth more than rigid short-term restrictions.

Content developed by the Filtrarte well-being team.

This article is for information purposes only and does not replace the guidance of a nutritionist or doctor. If you have specific nutritional needs, seeking professional advice is recommended.