Section A Nutrition Topic 1 The relationship between

Section A: Nutrition Topic 1: The relationship between diet and health – major diet-related health issues caused by a poor diet and lifestyle

Relationship between diet and health Learning objectives By the end of this topic you should have developed a knowledge and understanding of: • major diet-related health issues caused by poor diet and lifestyle OCR GCSE Food Preparation and Nutrition

A balanced diet All living things need food in order to survive. We need to eat food in the correct balance for: • providing the energy we need to survive, to keep us healthy and to help fight disease • growth and repair of body tissue • all bodily functions, which depend on the energy and trace elements found in the food we eat • stopping us feeling hungry • health and wellbeing, as we find eating a pleasurable and enjoyable experience. OCR GCSE Food Preparation and Nutrition

Obesity The number of people in the UK who are overweight or obese is increasing. 1993 2013 Overweight Men 41% 46% Obese Women Men 32% 13. 2% 32% 26% Women Men 16. 4% 57. 6% 23. 8% 67. 1% Women 48. 6% 57. 2% Overweight and obese OCR GCSE Food Preparation and Nutrition

Obesity and exercise People are taking less exercise than in previous years, but are still eating the same amount of food. This means that their weight gradually increases and the ratio of their weight in relation to their height is high. OCR GCSE Food Preparation and Nutrition

Cardiovascular disease is a term used to describe all different types of diseases of the heart and circulatory system. Blood flow to the heart, brain or body is reduced because of a blood clot or narrowing of the arteries. Coronary heart disease is one of the main types of cardiovascular disease. OCR GCSE Food Preparation and Nutrition

Causes of coronary heart disease Coronary heart disease is related to the amount of fat in the diet. A diet high in saturated fats is also likely to be high in cholesterol. The cholesterol can build up and be deposited with other material as ‘plaque’, causing arteries to narrow. This can cause a heart attack. OCR GCSE Food Preparation and Nutrition

How to reduce heart disease risk OCR GCSE Food Preparation and Nutrition

High blood pressure is often linked to coronary heart disease. To reduce the risk of high blood pressure you should: • Eat more fruits and vegetables • Eat a varied diet • Reduce fat in your diet • Eat more starchy carbohydrate food. OCR GCSE Food Preparation and Nutrition

Diabetes is a medical condition where the glucose in the bloodstream is not balanced correctly. Type 1: usually diagnosed in children and caused by the pancreas not producing enough insulin. Type 1 diabetics have insulin injections daily and need a carefully balanced diet. Type 2: diagnosed in older people, though there are more younger people being diagnosed due to poor diet. Treated with a healthy diet and increased physical activity. Once diagnosed, diabetics may also have to take medication or have insulin injections. OCR GCSE Food Preparation and Nutrition

What should diabetics eat? Meals for those with diabetes should follow the guidance in the Eatwell Guide, which includes: • High-fibre foods • Starchy carbohydrate foods such as potatoes, rice and pasta • Foods low in sugar – Sorbitol (artificial sweetener) can be used instead of sucrose and glucose. OCR GCSE Food Preparation and Nutrition

Diverticulitis This condition affects the large intestine. It is often linked to having a diet that is low in fibre. The lining of the bowel becomes inflamed, infected and damaged. Symptoms are pain and discomfort in the abdomen and feeling bloated. OCR GCSE Food Preparation and Nutrition

Bone health (osteoporosis) Healthy bones do not break easily. Calcium and other minerals are gradually added to the bones of children, adolescents and young adults to strengthen them. Bones are at their strongest between the ages of 20 and 35 when our peak bone mass is reached. If you do not achieve peak bone mass, you are more likely to get osteoporosis. The bones start to lose minerals and their strength, and the bones become brittle and break. OCR GCSE Food Preparation and Nutrition

Bone health Osteoporosis is linked to: • Your genes • Age – as you get older • Race – Afro-Caribbean people suffer less • Gender – women suffer more than men • Smoking and high alcohol consumption • Low body weight • Previous fractures • Some medicines OCR GCSE Food Preparation and Nutrition

Dental health To maintain healthy teeth you need to have a balanced diet based Tooth decay is caused when the bacteria in your mouth (plaque) feed on the sucrose to produce an acid. The acid then causes small holes in your teeth. Sugars found naturally in fruits and vegetables are not as harmful. You are advised to drink only one glass of fruit juice (150 ml) a day. OCR GCSE Food Preparation and Nutrition

Anaemia is caused by a lack of iron in the diet. Iron as it forms haemoglobin, which gives blood its red colour and carries oxygen round the body to the cells. Women and children are the most at risk. Symptoms are tiredness and lack of energy. The best sources of iron are liver and kidney, red meat, oily fish and leafy green vegetables. In the UK, breakfast cereals and bread are fortified with iron. Vegetarians need to ensure that they get an adequate supply of iron from bread, pulses and vegetables. OCR GCSE Food Preparation and Nutrition

Key words Anaemia: caused by lack of iron in the diet. Diabetes: a metabolic disorder caused by the poor absorption of glucose. Diverticular disease: caused by lack of fibre in the diet. Diverticulitis: a condition that affects the large intestine. Obese: excessive fatness, measured as a ratio of weight to height. Osteoporosis: the bones start to lose minerals and their strength and break easily. OCR GCSE Food Preparation and Nutrition