The key to good health is a balanced diet...but it can sometimes be hard to stick to! A guide to the food groups, vitamins and minerals that constitute a balanced diet.
The key to good health is a balanced diet...but it can sometimes be hard to stick to!
Day to day
To get a balanced diet, you need to eat the following every day:
-5 portions of fruit and vegetables (about 400 to 600g) in any form (fresh, cooked, juiced, puréed)
-3 portions of dairy produce (cheese, milk, yoghurts)
-1-2 pieces of fish, meat or eggs
-1-2 tablespoons or knobs of fat (oil, butter)
-3 portions of bread
According to the above, the ideal meal consists of 1 raw vegetable and/or 1 cooked vegetable, 1 source of protein (meat, fish or egg), 1 portion of bread, 1 portion of dairy, and 1 fresh or cooked piece of fruit.
To make sure you get the right vitamins and minerals, it’s important to vary the foods you eat and to limit your intake of processed foods, which are low in nutritional value but high in fat and hidden sugar.
In more detail
Each type of food has a nutritional value made up of macronutrients ( protein, carbohydrate, fat) which deliver energy, micronutrients (vitamins and minerals), fibre and water. You need all three for good nutrition.
Macronutrients
| |
Roles |
Requirements |
Sources |
Protein
1g = 3 Kcal |
The body's building blocks. Helps organs and muscles to function and develop |
1g per kilo of body weight every day (e.g. 60g if you weigh 60kg). 15% of energy intake |
Meat, fish, eggs, dairy produce (animal protein), cereals, nuts and seeds (vegetable protein) |
Carbohydrate
1g = 4 Kcal |
Provides the fuel that muscles and organs (including the brain) need to function |
Around 55% of energy intake, preferably as starch |
Cereals, nuts and seeds, starchy foods, dairy produce (except cheese), fruits, confectionery |
Fat
1g = 3 Kcal |
Makes up cells' energy reserves and protects the vital organs |
Around 30% of energy intake, preferebly in the form of unsaturated fat |
Butter, meat, fish, eggs, dairy products, oils, margarine, oil-producing fruits and lots of manufactured foods |
Micronutrients
-Vitamins
| Vitamin |
Roles |
Daily requirements |
Sources |
| B1 |
metabolism of carbohydrate, function of the nervous and muscular system |
1.1 mg |
Whole grains, meat, fish, pulses |
| B2 |
metabolism of protein, fat and carbohydrate |
1.5 mg |
Dairy produce |
| B3 |
energy production, growth, hormones |
11 mg |
Meat, fish, grains and cereals |
| B5 |
upkeep of mucous membranes, skin and hair |
5 mg |
Meat, fish, eggs |
| B6 |
metabolism of amino acids and proteins |
3.5 mg |
Meat, fish, eggs |
| B8 |
growth, metabolism of protein, carbohydrate and fat |
50 mg |
Liver, egg yolk |
| B9 |
growth, nervous system, bone marrow, red blood cells |
300 µg |
Leafy vegetables |
| B12 |
red blood cells, growth |
2.4 µg |
Animal products |
| C |
tissue repair, immune system, fighting free radicals |
110 mg |
Fresh fruits and vegetables |
| A |
vision, growth, detoxification, skin |
600 µg |
Dairy produce, eggs, coloured vegetables |
| D |
calcification |
5 µg |
Oily fish, egg yolk, liver |
| E |
protection against harmful substances |
12 µg |
Oils, margarine, sunflower seeds, sesame seeds |
| K |
blood coagulation |
45 µg |
Spinach, cauliflower, parsley |
-Minerals
| Minerals |
Roles |
Daily requirements |
Sources |
| Calcium |
builds and maintains bones and teeth |
900 mg |
Dairy produce, nuts, seeds and dried fruit |
| Iron |
makes haemoglobin, which transports oxygen in the blood |
16 mg |
Meat, eggs, pulses, chocolate |
| Fluorine |
strengthens teeth and bones |
2 mg |
Seafood, vegetables and dried fruit |
| Iodine |
thyroid function |
150 µg |
Sea salt, seafood |
| Potassium |
maintains the body's water balance |
50 mg |
Fruit and vegetables |
| Sodium |
maintains the body's water balance |
1 to 1.5 g |
Salt |
| Magnesium |
muscular contraction, mood improvement |
360 mg |
Dried fruit, chocolate, mineral water, whole grains and cereals |
| Phosphorus |
bone formation, functioning of nerve cells |
750 mg |
Dairy produce, fish, meat |
Fibre
Also known as roughage, fibre is made up of non-digestible plant components. It’s found in both the walls of vegetable cells (cellulose, pectin) and inside vegetable cells (gum, mucilage). Fibre slows down the emptying of the stomach after a meal, giving you a full feeling. It slows down carbohydrate absorption in the stomach, regulates the passage of food through the intestines and helps prevent constipation. It also reduces cholesterol and the risk of colon cancer.
You need 25 to 30g per day and you can get it from fresh and dried fruit, vegetables, grains and cereals (especially wholegrain).
Water
Most of our bodies are made of water. It transports nutrients and waste and stabilises body temperature. Because it is evacuated every day through urine, sweating, breathing and faeces, it has to be replaced by drinking plenty (1.5 litres of water per day) and eating foods that contain lots of water.
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