In CHD, the arteries that supply the heart with oxygen and nutrients become narrowed by atherosclerosis. This restricts the supply of blood and oxygen to the heart, particularly during exertion when there are more demands on the heart muscle.
What are the symptoms of CHD?
The main symptom is angina, caused by insufficient oxygen reaching the heart muscle because of reduced blood flow.
Angina is a feeling of heaviness, tightness or pain in the middle of your chest that may extend to, or just affect, your arms (especially the left), neck, jaw, face, back or abdomen.
It's most often experienced during exertion - if you run for a bus, for example, or climb stairs. It may occur in cold weather, after a heavy meal, or when you're feeling stressed. It can subside once you stop what you're doing and rest, or take medication.

Heart attack?
Unfortunately, for many people the first indication that something’s wrong is a heart attack.
This happens when the blood supply to a part of the heart muscle is completely interrupted or stops, usually when a blood clot forms in a diseased coronary artery that's already become narrowed by atherosclerosis.
The pain of a heart attack is often severe, and is frequently described as a central, crushing type of pain - like a tight band around the chest. Unlike angina, the pain doesn't subside when you rest.
Sometimes it can be mild, and is mistaken for indigestion. Some people have a heart attack without experiencing pain.
Other heart attack symptoms include sweating, light-headedness, nausea or breathlessness which, again, aren’t alleviated by rest.
If you suspect you, or someone else, is having a heart attack, seek medical help immediately by calling 999. Modern treatments can restore the blood supply to the heart muscle. The sooner treatment is given, the less permanent damage there will be.

A good daily target is to keep fat intake below 100g for men and 75g for women. If you're trying to lose weight, your target should be 70g for men and 55g for women.
Problems with fat
There are nine calories in every gram of fat - more than twice as many as in the equivalent amount of protein or carbohydrate. That's why cutting down on high-fat foods is the first step to a healthier diet.
A diet high in saturated fat - the type found in animal produce - is also one of the leading factors in heart disease, the number one cause of premature death in the UK. Saturated fat can block the arteries that carry blood away from the heart, leading to high blood pressure and heart attacks.
How to eat low fat
If you're used to eating high-fat food on most days, it's time to swap these for lower fat and starchy alternatives. Try the following suggestions, aiming to do as many as possible this week, but making them all part of your routine in the long-term:
Use a low-fat spread instead of butter or margarine.
Eat fewer meat pies, cheesy dishes and sausages, and choose lean meat instead.
Grill, bake and dry-fry (use a low heat and a non-stick pan).
Don't add oil or butter to vegetables and potatoes.
Make tomato-based sauces, not creamy ones. Try this grilled tomato sauce.
Use granules to make gravy instead of fat from the meat.
Have a couple of meat-free days a week and experiment with vegetarian dishes. For example, lentil and spinach stew, spinach and chickpea curry or nut loaf.
Reduce the portion size of meat to about 75g and fill up on vegetables and starchy foods, such as potatoes, rice, pasta, bread or couscous.
Remove visible fat from meat, eat fish at least once a week, choose low-fat milk and yoghurt, and keep cheese as an occasional treat.

Why do we need water?
Water comprises 50 to 70 per cent of an adult's total body weight, and without regular top-ups, our body's survival time is limited to a matter of hours or days.
Water is lost from the body through urine and sweat, and must be replaced through our diets. Many people, though, don't consume enough and as a result may become dehydrated, causing symptoms such as headaches, tiredness and loss of concentration. Chronic dehydration can contribute to a number of health problems, such as constipation and kidney stones.
How much do we need?
The body gets its water from three sources:
From drinks, either plain water or as part of other beverages.
From solid foods, especially fruits and vegetables.
As a by-product of chemical reactions within the body.
What about bottled waters? There are two types of bottled water: spring water and mineral water. Spring water is collected directly from the spring where it arises from the ground and must be bottled at the source. CR sources of spring water must meet certain hygiene standards, but may be treated in order that they meet limits set on pollution.
Mineral water emerges from under the ground, then flows over rocks before it's collected, resulting in a higher content of various minerals. Unlike spring water, it can't be treated except to remove grit and dirt. Different brands of spring and mineral waters will have differing amounts of minerals depending on their source.