Leena Watts
A nutrient-rich diet is essential for our bodies to function correctly. Experts divide nutrients into two categories: macronutrients and micronutrients. Macronutrients are the primary building blocks of your diet and provide your body with energy. Micronutrients, on the other hand, are needed in smaller doses but are critical for healthy development and disease prevention. So, which nutrients should make up the bulk of your diet?
| Characteristics | Values |
|---|---|
| Macronutrients | Carbohydrates, protein, and fat |
| Micronutrients | Vitamins, minerals, calcium, potassium, and magnesium |
| Other | Water, fiber, and antioxidants |
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What You'll Learn
Carbohydrates, protein, and fat
Carbohydrates, proteins, and fats are all essential macronutrients that should make up the bulk of a healthy diet.
Carbohydrates are the body's main source of energy. They provide fuel for the central nervous system and energy for working muscles. The body breaks down ingested carbohydrates into glucose, which can be used immediately or stored for future use. Carbohydrates should make up about half of your total daily calories. The best sources of carbohydrates are whole grains, fruits, and vegetables, which also provide essential vitamins, minerals, and fiber.
Protein is another essential macronutrient that plays a crucial role in the body. It is a building block of body tissue and can be found in muscles, bones, skin, hair, and virtually every other body part or tissue. Protein also makes up the enzymes that power many chemical reactions and the hemoglobin that carries oxygen in the blood. A complete protein source contains all the essential amino acids that the body needs but cannot produce itself. Animal sources of protein, such as meat and eggs, tend to be complete proteins. However, plant sources like legumes (beans and peas), nuts, seeds, and whole grains can also provide a good amount of protein when combined in a varied diet.
Dietary fats are also essential for maintaining good overall health. Fat helps give the body energy, protects organs, supports cell growth, keeps cholesterol and blood pressure under control, and aids in the absorption of vital nutrients. There are two main types of dietary fats: saturated and unsaturated. Saturated fats, primarily found in animal products, can increase LDL ("bad") cholesterol levels and the risk of cardiovascular disease. On the other hand, unsaturated fats found in avocados, nuts, seeds, and plant oils help raise HDL ("good") cholesterol levels. While it's important to limit saturated fat intake to less than 10% of daily total calories, completely eliminating fat from your diet is not advisable. Instead, focus on adding more healthy fats to your meals and reducing unhealthy saturated fats.
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Vitamins and minerals
Vitamins are organic compounds that are essential to an organism's nutrition in small quantities. There are 13 essential vitamins, which are divided into two groups: fat-soluble and water-soluble. Most people can get the required amount of vitamins through food alone, but in some cases, a person may need to take a supplement. Vitamins are found in fruits and vegetables, with dark, leafy greens being an excellent source of many vitamins.
Minerals are inorganic compounds that are also essential to an organism's nutrition in small quantities. One essential mineral is calcium, which is important for keeping bones strong. Good sources of calcium include dairy (especially yogurt), calcium-fortified orange juice or soy milk, and leafy green vegetables such as kale. Another essential mineral is magnesium, which plays a big role in the body.
In addition to vitamins and minerals, the other four essential nutrients are proteins, fats, water, and carbohydrates. These six essential nutrients are available in a wide variety of animal and plant-based foods that make up a well-balanced diet, such as meat, eggs, fruits, vegetables, and whole grains.
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Water
- Maintaining the health and integrity of every cell in the body
- Keeping the bloodstream liquid enough to flow through blood vessels
- Helping eliminate the by-products of the body's metabolism, excess electrolytes (e.g. sodium and potassium), and urea, which is a waste product formed through the processing of dietary protein
- Regulating body temperature through sweating
- Moistening mucous membranes (such as those of the lungs and mouth)
- Bringing nutrients to cells
- Getting rid of waste
- Protecting joints and organs
- Maintaining saliva production, which is essential for breaking down solid food and keeping the mouth healthy
- Preventing dehydration, which can cause constipation, headaches, fatigue, and impaired physical and mental functioning
The body's water content is higher in men than in women and falls in both with age. Mature adults lose about 2.5 to 3 litres of water per day, while elderly people lose about 2 litres per day. Water loss may increase in hot weather and with prolonged exercise. The recommended daily water intake varies depending on factors such as activity level, health conditions, height, weight, and gender. The Institute of Medicine recommends that men drink 13 cups (about 3 litres) of water each day.
Tap water is generally considered the best source of water, as it is mostly free, readily available, and does not contain unnecessary calories or additives. Fluoridated tap water also helps prevent dental decay. Bottled water is another option, but it should be kept at the same temperature as other groceries to prevent the breakdown of chemical bonds in the plastic. For those who dislike the taste of plain water, adding a squeeze of lemon or other citrus fruits is recommended. While water should be the primary beverage, other fluids such as milk, coffee, tea, soup, and juice can also contribute to daily water intake. However, sugary drinks should be avoided as they can lead to weight gain, reduced bone strength, and tooth decay.
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Calcium, potassium, and vitamin D
A well-balanced diet is made up of a variety of nutrients, including macronutrients and micronutrients. Macronutrients are the primary building blocks of your diet and include protein, carbohydrates, and fats. Micronutrients, on the other hand, include vitamins and minerals, which are needed in smaller amounts but play crucial roles in supporting the immune system, cell health, and metabolism.
Potassium is an important mineral that often doesn't get enough attention. It is necessary for the proper functioning of all cells in the body. Potassium helps regulate heartbeat, ensures proper muscle and nerve function, and is vital for synthesizing protein and metabolizing carbohydrates. A diet rich in potassium can help maintain healthy blood pressure levels. The recommended adequate intake for potassium is 4,700 mg, and it can be found in bananas, apricots, prunes, orange juice, squash, and potatoes.
Vitamin D is synthesized in the skin when exposed to sunlight, and it plays a crucial role in calcium absorption and bone health. It also supports immune function and overall health. Including good sources of vitamin D in your diet, such as fatty fish, egg yolks, and fortified dairy products, can help ensure adequate levels.
In summary, calcium, potassium, and vitamin D are essential micronutrients that play vital roles in maintaining bone health, nerve and muscle function, immune system support, and overall health. Including a variety of food sources rich in these nutrients, as well as getting adequate sunlight exposure, can help ensure you're getting enough of these important nutrients.
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Fibre
There are two categories of fibre: soluble and insoluble. Soluble fibre soaks up water and helps to bulk out faeces, allowing them to pass through the gut more easily. It also slows down the rate of digestion. Soluble fibre includes pectins, gums, and mucilage, found mainly in plant cells. Insoluble fibre, on the other hand, does not absorb water and speeds up the time that food passes through the gut. It includes cellulose, hemicelluloses, and lignin, which make up the structural parts of plant cell walls.
Most people do not get the recommended amount of fibre, which is 14 grams for every 1,000 calories. To increase your fibre intake, choose snacks like dried fruit, fresh fruit, wholegrain rice, or oatcakes with hummus or avocado. You can also add beans or lentils to soups, stews, and curries.
While fibre supplements are available, it is better to get most of your fibre from natural food sources, such as fruits and vegetables. Start slowly and gradually increase your fibre intake to avoid any gastrointestinal upset.
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Frequently asked questions
The essential nutrients are compounds that the body cannot make on its own or in sufficient quantity. They are divided into two categories: macronutrients and micronutrients. Macronutrients, including protein, carbohydrates, and fats, are the primary building blocks of your diet and provide your body with energy. Micronutrients, including vitamins and minerals, are needed in smaller doses but are critical for supporting the immune system, cells, and metabolism.
To get your macronutrients, focus on consuming carbohydrates, protein, and fats. Carbohydrates should make up 45-65% of your daily calories and can be found in foods such as whole grains, fruits, and vegetables. For protein, try to include lean meat, fish, eggs, dairy, tofu, nuts, beans, and lentils in your diet. Remember to consume healthy fats within reasonable calorie limits, as they have more than twice as many calories per gram as protein or carbohydrates.
Micronutrients such as vitamins and minerals are essential to keep your body functioning optimally. Aim to consume a variety of fruits and vegetables to get a full range of vitamins, minerals, and antioxidants. Dark, leafy greens, for example, are an excellent source of many nutrients. Dairy products, calcium-fortified orange juice or soy milk, and leafy green vegetables are good sources of calcium, which is essential for keeping your bones strong.
The best way to ensure you are getting enough nutrients is to eat a healthy, balanced diet with a variety of plant and animal foods. However, if you have specific dietary restrictions or medical conditions, you may need to take supplements. Speak to your healthcare provider or a dietitian to discuss your nutritional needs and determine if supplements are right for you.
