Essential amino acids (protein) are required for cell, especially muscle, construction.
Essential fatty acids are required for brain and cell membrane construction.
Any diet that fails to meet minimum nutritional requirements can threaten general health (and physical fitness in particular).
If a person is not well enough to be active, weight loss and good quality of life will be unlikely.
Base your meals on starchy foods Starchy foods such as bread, cereals, rice, pasta and potatoes are a really important part of a healthy diet.
Try to choose wholegrain varieties of starchy foods whenever you can 2.
Eat lots of fruit and veg Most people know we should be eating more fruit and veg.
But most of us still aren't eating enough.
Try to eat at least 5 portions of a variety of fruit and veg every day.
It might be easier than you think.
Eat more fish Most of us should be eating more fish - including a portion of oily fish each week.
It's an excellent source of protein and contains many vitamins and minerals.
Aim for at least two portions of fish a week, including a portion of oily fish.
You can choose from fresh, frozen or canned - but remember that canned and smoked fish can be high in salt.
Examples of white or non-oily fish Cod, haddock, plaice, coley, tinned tuna, skate, 4.
Cut down on saturated fat and sugar To stay healthy we need some fat in our diets.
What is important is the kind of fat we are eating.
There are two main types of fat: * saturated fat - having too much can increase the amount of cholesterol in the blood, which increases the chance of developing heart disease * unsaturated fat - having unsaturated fat instead of saturated fat lowers blood cholesterol Try to eat these sorts of foods less often or in small amounts: * meat pies, sausages, meat with visible white fat * hard cheese * butter and lard * pastry * cakes and biscuits * cream, soured cream and crème fraîche * coconut oil, coconut cream or palm oil For a healthy choice, use just a small amount of vegetable oil or a reduced-fat spread instead of butter, lard or ghee.
And when you are having meat, try to choose lean cuts and cut off any visible fat.
How do I know if a food is high in fat? Look at the label to see how much fat a food contains.
Generally the label will say how many grams (g) of fat there are in 100g of the food.
Some foods also give a figure for saturated fat, or 'saturates'.
Use the following as a guide to work out if a food is high or low in fat.
Total fat - what's high and what's low? High is more than 20g fat per 100g Low is 3g fat or less per 100g If the amount of fat per 100g is in between these figures, then that is a medium level of fat.
Saturated fat - what's high and what's low? High is more than 5g saturates per 100g Low is 1.
5g saturates or less per 100g If the amount of saturates per 100g is in between these figures, then that is a medium level of saturated fat.
Remember that the amount you eat of a particular food affects how much fat you will get from it.
Try to choose more foods that are low in fat and cut down on foods that are high in Most people in the UK are eating too much sugar.
We should all be trying to eat fewer foods containing added sugar, such as sweets, cakes and biscuits, and drinking fewer sugary soft and fizzy drinks.
Having sugary foods and drinks too often can cause tooth decay, especially if you have them between meals.
Many foods that contain added sugar can also be high in calories so cutting down could help you control your weight.
How do I know if a food is high in added sugar? Take a look at the label.
The ingredients list always starts with the biggest ingredient first.
But watch out for other words used to describe added sugars, such as sucrose, glucose, fructose, maltose, hydrolysed starch and invert sugar, corn syrup and honey.
If you see one of these near the top of the list, you know the food is likely to be high in added sugars.
Another way to get an idea of how much sugar is in a food is to have a look for the 'Carbohydrates (of which sugars)' figure on the label.
But this figure can't tell you how much is from added sugars, which 5.
Try to eat less salt - no more than 6g a day Lots of people think they don't eat much salt, especially if they don't add it to their food.
But don't be so sure! Every day in the UK, 85% men and 69% women eat too much salt.
Adults - and children over 11 - should have no more than 6g salt a day.
Younger children should have even less.
Three-quarters (75%) of the salt we eat is already in the food we buy, such as breakfast cereals, soups, sauces and ready meals.
So you could easily be eating too much salt without realising it.
How do I know if a food is high in salt? Check the label to find out the figure for salt per g 6.
Get active and try to be a healthy weight It's not a good idea to be either underweight or overweight.
Being overweight can lead to health conditions such as heart disease, high blood pressure or diabetes.
Being underweight could also affect your health.
Check if you are the right weight for your height using the link below.
If you're worried about your weight, ask your GP or a dietitian for advice.
But if you think you just need to lose a little weight, the main things to remember are: * only eat as much food as you need * make healthy choices - it's a good idea to choose low-fat and low-sugar varieties, eat plenty of fruit and veg and wholegrains * get more active It's also important to eat a variety of types of food so you get all the nutrients your body needs.
Physical activity is a good way of using up extra calories, and helps control our weight.
But this doesn't mean you need to join a gym.
But crash diets aren't good for your health and they don't work in the longer term.
The way to reach a healthy weight - and stay there - is to change your lifestyle gradually.
Aim to lose about 0.
5 to 1kg (about 1 to 2lbs) a week, until you reach a healthy weight for your height.
More on healthy weight Check your height for weight 7.
Drink plenty of water We should be drinking about 6 to 8 glasses (1.
2 litres) of water, or other fluids, every day to stop us getting dehydrated.
When the weather is warm or when we get active, our bodies need more than this.
But avoid drinking soft and fizzy drinks that are high in added sug Alcohol There is nothing wrong with the occasional drink.
But drinking too much can cause problems.
Alcohol is also high in calories, so cutting down could help you control your weight.
Women can drink up to 2 to 3 units of alcohol a day and men up to 3 to 4 units a day, without significant risk to their health.
A unit is half a pint of standard strength (3 to 5% ABV) beer, lager or cider, or a pub measure of spirit.
A glass of wine is about 2 units and alcopops are about 1.
For good health, it's a good idea to spread your drinking throughout the week and avoid binge drinking.
Drinking heavily over a long period of time can damage the 8.
Don't skip breakfast Breakfast can help give us the energy we need to face the day, as well as some of the vitamins and minerals we need for good health.
Some people skip breakfast because they think it will help them lose weight.
But missing meals doesn't help us lose weight and it isn't good for us, because we can miss out on essential nutrients.
Research shows that eating breakfast can actually help people control their weight.
This is probably because when we don't have breakfast we're more likely to get hungry before lunch and snack on foods that are high in fat and sugar, such as biscuits, doughnuts or past.