Madeleine Hull
A balanced diet is essential for maintaining good health and can help individuals feel their best. It involves consuming a variety of foods from different groups, including fruits, vegetables, protein, grains, and dairy, in the right proportions. These foods provide the body with the necessary nutrients to function correctly and reduce the risk of obesity, disease, infection, and fatigue. The specific dietary needs may vary based on age, gender, lifestyle, cultural context, and physical activity levels. Calorie intake is also crucial, as it should match energy expenditure to maintain a healthy body weight. A balanced diet promotes optimal growth and development while preventing malnutrition and diet-related non-communicable diseases.
| Characteristics | Values |
|---|---|
| Purpose | To give the body the nutrients it needs to function correctly and stay healthy. |
| Calories | The average person needs about 2,000 calories a day to maintain their weight, but this depends on age, sex, and physical activity level. |
| Nutrients | A balanced diet includes fruits, vegetables, protein, grains, and dairy. |
| Weight Management | A balanced diet can help manage weight when combined with exercise. |
| Disease Prevention | A balanced diet can reduce the risk of disease, including type 2 diabetes, high blood pressure, and some cancers. |
| Fat | Fat is essential but should be mostly unsaturated fats, with saturated fats limited to 10% of energy intake, and trans fats limited to 1%. |
| Sugar | Free sugar intake should be less than 10% of energy intake, with a further reduction to 5% suggested for additional health benefits. |
| Salt | Salt intake should be less than 5g per day, and salt should be iodized. |
| Alcohol | Moderate alcohol consumption may offer health benefits for some, but it poses risks for others. |
| Individual Variation | A balanced diet varies based on individual characteristics like age, gender, lifestyle, cultural context, and physical activity. |
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What You'll Learn
The importance of fruits and vegetables
A balanced diet is one that gives your body the nutrients it needs to function correctly. It is an important part of maintaining good health and can help you feel your best. A healthy, balanced diet will usually include fruits and vegetables, among other nutrients.
Fruits and vegetables are an important part of a healthy diet, and variety is as important as quantity. No single fruit or vegetable provides all of the nutrients you need to be healthy. Eating plenty of fruits and vegetables every day can lower blood pressure, reduce the risk of heart disease and stroke, prevent some types of cancer, lower the risk of eye and digestive problems, and have a positive effect on blood sugar, which can help keep appetite in check. Eating non-starchy vegetables and fruits like apples, pears, and green leafy vegetables may even promote weight loss.
There are at least nine different families of fruits and vegetables, each with potentially hundreds of different plant compounds that are beneficial to health. Eating a variety of types and colours of produce gives your body the mix of nutrients it needs. For example, citrus fruits are a good source of vitamin C, which is important for the growth and repair of all body tissues. It helps heal cuts and wounds and keeps teeth and gums healthy. Vitamin C also helps your body absorb iron more easily.
The Dietary Guidelines for Americans 2010 recommend that half of your plate should be fruits and vegetables. MyPlate.gov also supports this recommendation. Fruits and vegetables are generally low in energy density and often good sources of fibre and potassium, but the nutritional contribution of standard servings varies widely. Fibre intake is linked to a lower incidence of cardiovascular disease and obesity. Fruits and vegetables also supply vitamins and minerals to the diet and are sources of phytochemicals that function as antioxidants, phytoestrogens, and anti-inflammatory agents.
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Lean protein sources
Meat and poultry are good sources of protein, but they can also contain unhealthy amounts of saturated fats and sodium. Therefore, it is important to choose leaner meats and poultry. Lean meats include chicken, turkey, beef, and pork. When choosing beef, opt for lean cuts with less than 10 g of total fat and no more than 4.5 g of saturated fat per 3.5 oz (100 g) serving. Ground beef should be at least 90% lean. For poultry, choose skinless chicken breasts.
Fish is another excellent source of lean protein. White-fleshed fish, such as cod, haddock, grouper, halibut, tilapia, and bass, are quite lean and provide less than 3 g of fat, 20–25 g of protein, and 85–130 calories per 3.5 oz (100 g). These types of fish are also good sources of hunger-satisfying protein with little fat and relatively few calories. Oily fish, such as salmon, trout, tuna, and mackerel, are rich in protein and omega-3 fatty acids, which are beneficial for heart health. It is recommended to eat at least two portions of fish per week, including one portion of oily fish.
Dairy products like milk, cheese, and yogurt are also rich in protein and other essential nutrients. However, they can be high in saturated fat, so it is best to choose low-fat options and limit the amount of cheese consumed. Greek yogurt, in particular, is a great option as it is high in protein and nutrients such as calcium, vitamins, and minerals.
For those who follow a vegetarian or vegan diet, there are plenty of plant-based sources of lean protein. Beans, peas, lentils, and pulses are all good options. They are high in protein, fiber, and other essential nutrients. Tofu is another versatile plant-based protein source that provides all the essential amino acids. Eggs are also a good source of lean protein, especially egg whites, which are low in fat.
In addition to these specific food sources, it is important to vary your protein choices to ensure you are getting a range of nutrients. This can include nuts, seeds, and soy products. By including a variety of lean protein sources in your diet, you can support overall health and well-being.
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Dairy and alternatives
Dairy products are an important part of a balanced diet, providing protein, calcium, and various vitamins and minerals. Milk, yoghurt, and cheese are common dairy foods that can be incorporated into meals and snacks. For young children, dairy is especially beneficial for building bones and keeping teeth healthy. Breast milk is recommended for babies during their first six months, after which solid foods containing dairy, such as cheese sauce and custard, can be introduced. Pasteurised full-fat cheese is also suitable for babies from six months onwards.
However, dairy products can be high in saturated fat, which may lead to increased cholesterol levels and potential weight gain. Therefore, it is important to make healthy choices and opt for lower-fat options, such as semi-skimmed or skimmed milk, lower-fat cheeses, and lower-fat, lower-sugar yoghurt. Additionally, unsweetened calcium-fortified dairy alternatives, such as soy milk, coconut milk, or oat milk, can be included in this food group. These alternatives are suitable for those who are intolerant or choose not to consume dairy, ensuring they still obtain the necessary nutrients.
When it comes to dairy alternatives, calcium-fortified options are recommended to ensure adequate calcium intake. Fortified soy milk, for example, can provide potassium and vitamin D in addition to calcium. Lactose-free milk is another alternative, and it is important to note that dairy alternatives with high calcium content are considered part of the Dairy Group, while those with low calcium and high fat, such as cream cheese and butter, are not.
In summary, dairy and its alternatives play a vital role in a balanced diet, offering essential nutrients like protein, calcium, potassium, and vitamin D. By including a variety of dairy products or suitable alternatives, individuals can maintain their health and support the development and maintenance of strong bones and teeth.
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Carbohydrates and grains
Carbohydrates are a group of foods that include grains, fruits, and vegetables. They are a vital source of energy and should make up half of your daily calorie intake. The average person needs about 2,000 calories every day to maintain their weight, but this depends on their age, sex, and physical activity level.
There are two major forms of dietary carbohydrates: complex carbs and simple carbs. Complex carbohydrates consist of three or more sugar molecules bonded together in a complex chemical structure. They take longer to digest, which means that the breakdown product, glucose, enters the bloodstream at a slower rate. This is why complex carbohydrates are less likely to cause blood sugar spikes, which can lead to insulin resistance over time. Whole grains are an example of complex carbohydrates and include whole wheat, barley, wheat berries, quinoa, oats, and brown rice. They are considered healthier than refined grains because they are less processed and stripped of valuable nutrients.
On the other hand, simple carbohydrates consist of shorter chains of sugars, such as sucrose (table sugar) and glucose. They are digested much more quickly, which can cause a rapid spike in blood sugar and insulin release, followed by an inevitable crash. Over time, too much consumption of simple carbohydrates can increase the risk of cavities and health issues like type 2 diabetes. Refined grains, such as white rice and white flour, are considered minimally processed but may be less desirable due to their minimal nutritional value.
When choosing carbohydrates, it is best to opt for unprocessed and minimally processed options and avoid processed and ultra-processed carbohydrates. Whole grains are an excellent choice as they are high in fiber and have a milder effect on blood sugar and insulin levels. They also contain health-promoting nutrients such as B vitamins, iron, copper, zinc, magnesium, antioxidants, and phytochemicals.
In summary, carbohydrates and grains are an essential part of a balanced diet, but it is important to choose complex carbohydrates and whole grains whenever possible to maintain health and avoid negative health outcomes.
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Healthy fats and oils
Fat is an essential part of a healthy, balanced diet, as it provides energy and supports cell function. However, it is important to consume fat in moderation, as excess fat can lead to weight gain and increase the risk of cardiovascular disease. The type of fat consumed is crucial, with monounsaturated and polyunsaturated fats being healthier options. Monounsaturated fats, such as canola oil, improve blood cholesterol levels, while polyunsaturated fats, including omega-3 and omega-6, help to lower bad cholesterol (LDL cholesterol). Omega-3 fatty acids, found in oily fish, flaxseed oil, rapeseed oil, walnuts, and egg, offer additional benefits such as preventing blood clotting and reducing the risk of stroke.
When choosing fats and oils, it is recommended to opt for unsaturated oils and spreads, such as olive oil, particularly extra virgin olive oil, which is considered a healthy fat due to its minimal processing. Other healthy options include liquid non-tropical plant oils like canola, soybean, corn, safflower, sunflower, and nut oils. These unsaturated fats can replace saturated fats, such as butter, coconut oil, and palm oil, in your diet. Additionally, nuts, while high in fat, are a good source of fibre and can be enjoyed in moderation.
It is important to limit highly processed foods, as they are a significant source of saturated fats. By choosing whole, natural foods, especially plant-based options, you can effectively reduce your saturated fat intake. Canada's Food Guide recommends a shift towards plant-based alternatives to help achieve this reduction.
Deep-fried foods, although tasty, are often high in calories and low in nutritional value, so they should be consumed sparingly. It is also worth noting that foods labelled "trans-fat-free" may still be unhealthy due to their high sugar content and low nutrient value. Therefore, it is always advisable to read nutrition labels and ingredient lists to make informed choices.
In summary, consuming a variety of healthy fats and oils is an essential part of a balanced diet. Opting for unsaturated fats, such as olive oil and plant-based oils, while moderating saturated and trans fats, supports a nutritious and wholesome diet.
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