Brenda Khan
A balanced diet is essential for maintaining good health and ensuring the body gets all the nutrients it needs to function correctly. It includes foods from five groups: fruits, vegetables, protein, grains, and dairy, with each group fulfilling a specific nutritional requirement. The exact composition of a balanced diet varies according to an individual's sex, age, and lifestyle, but the fundamental principle remains the same: providing the body with adequate nutrition to support overall health and well-being. This means consuming a variety of fresh, whole foods while limiting processed foods, sugary drinks, and excessive salt intake.
| Characteristics | Values |
|---|---|
| Purpose | To fulfill all of a person's nutritional needs and reduce the risk of disease |
| Food groups | Fruits, vegetables, protein, grains, and dairy |
| Proportions | 1/4 fruits, 1/4 vegetables, 1/4 protein, 1/4 grains |
| Fruit | Whole fruits are recommended over fruit juice. Local, in-season fruits are fresher and more nutritious. |
| Vegetables | Choose from different subgroups to enjoy the most benefits. |
| Grains | At least half of the grains consumed should be whole grains. |
| Protein | Choose lean red meats, seafood, poultry, eggs, nuts, beans, lentils, and seeds. |
| Dairy | Dairy is a good source of calcium. Opt for low-fat or lactose-free options if lactose intolerant. |
| Fats | Choose healthy unsaturated fats like olive oil, sunflower oil, and avocado. Limit saturated fats and avoid trans fats. |
| Sugar and salt | Limit intake of sugar and salt. |
| Weight management | A balanced diet can help manage weight and reduce the risk of obesity. |
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What You'll Learn
The importance of fruits and vegetables
A balanced diet is one that fulfils all of a person's nutritional needs. It comprises foods from five groups: fruits, vegetables, protein, grains, and dairy. Eating a balanced diet helps people get the nutrients and calories they need to function properly and avoid eating junk food or food with little nutritional value.
Fruits and vegetables are an important part of a healthy, balanced diet. They are a good source of dietary fibre, which can make you feel fuller for longer and prevent overconsumption of food. They are also low in fat, salt, and sugar. Eating a diet rich in fruits and vegetables can lower blood pressure, reduce the risk of heart disease, and stroke, and prevent some types of cancer. They are also a source of phytochemicals that function as antioxidants, phytoestrogens, and anti-inflammatory agents.
Scientific research shows that if you regularly eat lots of fruit and vegetables, you have a lower risk of developing cardiovascular disease. Compared with those in the lowest category of fruit and vegetable intake (less than 1.5 servings a day), those who averaged 8 or more servings a day were 30% less likely to have had a heart attack or stroke. Green leafy vegetables, such as lettuce, spinach, Swiss chard, and mustard greens, were most strongly associated with decreased risk. However, it is important to note that variety is as important as quantity when it comes to fruits and vegetables. No single fruit or vegetable provides all of the nutrients needed to be healthy, so it is important to eat a variety of types and colours of produce to give your body the mix of nutrients it needs.
Fruits and vegetables are also a handy snack food and can be easily carried to work or school. They can be added to meals and snacks and used in a variety of ways to add interest to your meals. Frozen or canned fruits and vegetables are just as nutritious as fresh and are a convenient and budget-friendly option.
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Dairy and alternatives
Dairy products, such as milk, cheese, and yoghurt, are a good source of protein and calcium. They can form part of a healthy, balanced diet. However, they can be high in saturated fat, so it's important to make healthy choices. When buying dairy products, opt for lower-fat options such as semi-skimmed, 1% fat, or skimmed milk, lower-fat hard cheeses, and lower-fat yoghurt.
Dairy alternatives, such as unsweetened calcium-fortified soya drinks, are also included in this food group and can be a good substitute for those who are lactose intolerant or do not consume dairy. Other dairy alternatives include lactose-free milk and fortified soy milk and yoghurt. These alternatives can provide calcium, potassium, vitamin D, and protein.
For young children, dairy products are an important source of calcium, protein, and vitamins, which help build bones and keep teeth healthy. Babies can eat pasteurised full-fat cheese from 6 months old, and full-fat dairy products such as cheese, fromage frais, and yoghurt are recommended up to the age of 2 years.
Overall, dairy and its alternatives can be a nutritious part of a balanced diet, providing essential nutrients such as calcium, protein, and vitamins. However, it is important to be mindful of the fat content and choose lower-fat options when possible.
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Proteins
Protein is an essential part of a healthy, balanced diet. Proteins are large molecules that support cell structure, immune function, movement, chemical reactions, hormone synthesis, and more. They are made up of tiny building blocks called amino acids, nine of which are essential, meaning our bodies need them but cannot produce them on their own.
Protein can come from animal sources, such as meat, eggs, and milk, as well as soy and quinoa. These are called complete proteins as they contain all the essential amino acids the body needs and are the highest-quality protein sources. Protein can also be sourced from plants, and while most plant-based proteins do not contain all the essential amino acids, eating a variety of them throughout the day ensures a healthy mix. Examples of plant-based proteins include tofu, tempeh, lentils, chickpeas, black beans, and spelt.
Protein-rich foods are vital for maintaining overall health and well-being. They are the building blocks of bones, cartilage, muscle, blood, skin, enzymes, hormones, and vitamins. They are essential for growth and development, repairing and building cells and tissues, and play an important role in body processes such as blood clotting, fluid balance, and immune response.
It is important to note that excessive protein intake may lead to inadequate carbohydrate and fat consumption. A well-rounded diet that includes a balance of macronutrients is essential for overall health. Additionally, increasing protein intake without increasing physical activity may result in weight gain.
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Carbohydrates
The amount of carbohydrates in a diet is less important than the type of carbohydrate. Healthy, whole grains such as whole wheat bread, rye, barley, and quinoa are better choices than highly refined white bread or French fries. Unprocessed or minimally processed whole grains, vegetables, fruits, and beans promote good health by delivering vitamins, minerals, fibre, and phytonutrients. These healthy carbohydrates should fill most of your plate, with vegetables and fruits taking up about half, and whole grains filling up the other half.
Unhealthier sources of carbohydrates include white bread, pastries, sodas, and other highly processed or refined foods. These foods contain easily digestible carbohydrates that may contribute to weight gain, interfere with weight loss, and promote diabetes and heart disease.
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Fats
Fat is one of the three macronutrients and is an essential source of energy for the body. It is necessary for the absorption of fat-soluble vitamins A, D, E, and K. Additionally, fat plays a crucial role in building cell membranes, blood clotting, muscle movement, and inflammation control. While fat is often associated with cholesterol and cardiovascular disease, not all fats are equal, and consuming the right types of fats is vital for maintaining good health.
There are several types of fats, including saturated, unsaturated, monounsaturated (MUFA), polyunsaturated (PUFA), and trans fats. Saturated fats have been linked to increased cholesterol and inflammation levels, which can lead to heart disease, diabetes, and other chronic illnesses. Therefore, it is recommended to limit saturated fat intake to less than 10% of total calorie consumption. Sources of saturated fat include fatty beef, lamb, pork, poultry with skin, lard, butter, cheese, and other dairy products made with whole or reduced-fat milk. It is also found in palm oil, palm kernel oil, and coconut oils, although these plant-based sources do not contain cholesterol.
On the other hand, unsaturated fats, including monounsaturated (MUFA) and polyunsaturated (PUFA), are considered healthier options. These fats can help reduce harmful cholesterol levels and contribute to a favourable HDL-LDL cholesterol ratio, protecting heart health. MUFA sources include olive oil, canola oil, peanut oil, safflower oil, sesame oil, avocado, nuts, and seeds, while PUFA sources include fatty fish like salmon and mackerel, providing omega-3 fatty acids.
Trans fats, both naturally occurring and artificial, are generally considered unhealthy. They do not provide any known health benefits and are linked to increased cholesterol and inflammation levels, similar to saturated fats. Therefore, it is recommended to avoid or minimise the consumption of trans fats.
When it comes to incorporating fats into a balanced diet, it is essential to prioritise unsaturated fats while minimising saturated and trans fats. This can be achieved by choosing healthier oils and spreads, such as olive oil, and consuming fatty fish, avocados, nuts, and seeds. Additionally, opting for lower-fat dairy products and leaner cuts of meat can help reduce saturated fat intake. Remember, fat is an essential part of a balanced diet, but it should be consumed in moderation, with a focus on selecting the healthiest options to promote overall health and well-being.
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Frequently asked questions
A balanced diet is one that maintains or improves overall health, providing the body with essential nutrition, including fluids, macronutrients, micronutrients, fibre, and food energy. It also helps with weight management.
A balanced diet should include a variety of nutritious foods, such as fruits, vegetables, whole grains, legumes, nuts, and seafood. It should also include healthy fats and proteins, with the majority of protein coming from plant sources.
A balanced diet can help with weight management by changing the energy balance in the body and promoting healthy weight, growth, and activity. This can be further supported by physical exercise and practising moderation.
It is important to limit the intake of ultra-processed foods, sugary foods, and salt/sodium. It is also beneficial to focus on including a variety of food groups and ensuring adequate nutrition without exceeding calorie requirements.
