Judaism forbids the consumption of pork and shellfish.
All food Jews eat must be kosher, it has to be slaughtered in a certain way for it to be fit for eating.
In addition to these rules they must never eat or cook dairy products and meat together.

Muslims and their religion forbids them from eating pork and drinking alcohol. All food they eat must be halal, it has to be slaughtered in a certain way for it to be lawful.

Hindus do not eat beef because they believe it is a sacred animal. In fact their diet is mostly vegetarian.

Coeliac disease means that someone has an intolerance to gluten. They have to avoid cereals such as wheat, barley and rye, and foods which contain these cereals like pasta, cakes and bread.There is a wide variety of gluten free products available to buy at most supermarkets. Symptoms of coeliac disease include diarrhoea, abdominal pain, bloating and weight loss.

Lactose is a natural sugar found in milk and people who are lactose intolerant are unable to break down this sugar and absorb it into their blood. They have to avoid foods such as yogurt, cream, cheese and chocolate.Symptoms of lactose intolerance include a bloated stomach, flatulence (wind) and diarrhoea.

Pregnant women do not drink alcohol and they should try to eat a healthy balanced diet to give the unborn baby all the nutrients it needs to grow and develop. They have to avoid a range of foods such as pate, undercooked or raw egg, undercooked or rare meat and fish as they can all be harmful to their unborn child. Before they become pregnant and for the first three months of their pregnancy, they should try to eat foods rich in folic acid like green leafy vegetables - cabbage and broccoli, and pulses - chickpeas, black-eyed beans and lentils. Folic acid helps reduce the risk of the baby being born with spina bifida.

When someone with a nut allergy comes into contact with nuts, their immune system mistakes the food as a threat to the body and releases a chemical called histamine. A severe allergic reaction is known as anaphylaxis and can potentially be life-threatening. Symptoms include a rash, difficulty breathing, face and lips swelling and a tightening throat. An injection of an anti-allergy medicine called adrenaline should be given as soon as a reaction is suspected. Emergency services should also be called.Milk, eggs, fish and shellfish are other foods that most commonly cause an allergic reaction.

Type 1 occurs when the body is unable to produce any insulin. People with type 1 diabetes will need to take insulin injections for life. The condition is usually diagnosed early on in life.
Type 2 occurs when the body doesn’t produce enough insulin for it to function properly, or when the body’s cells do not react to insulin. This type of diabetes is progressive and can be diagnosed later in life. It can also be controlled by eating a healthy diet. Symptoms of diabetes include feeling very thirsty, needing the toilet more than usual, especially at night, extreme tiredness, weight loss and muscle wasting.

Coronary heart disease is a condition that means a gradual build up of fatty material has narrowed the walls of someones coronary arteries. They should give up smoking and try to exercise regularly. They should try to lower their cholesterol by avoiding foods high in saturated fat and eating foods high in fibre such as fruits and vegetables, oats, nuts, beans and pulses.

Over time, eating excess calories and not exercising enough to burn off the calories can lead weight gain. Doctors will tell you that you must eat a healthy, calorie-controlled diet and increase the amount of exercise you undertake if you wish to live a healthy lifestyle. Type 2 diabetes can develop due to poor diet and can lead to a risk of developing heart disease. Being obese can also shorten life expectancy and it may make everyday tasks increasingly difficult to do.

Age can affect a persons choice of food. Some older age people can lost their teeth and are unable to eat chewy foods such as toffee and crusty bread. They can suffer from osteoporosis which means their bones are weak and can easily break. They should try to eat food rich in calcium such as yogurt. Some tend to stay away from spicy foods as they can upset their stomach.

Lacto-vegetarian means to not eat meat, poultry, fish or eggs but dairy products are allowed. People choose to be a vegetarian for many different factors, reasons can include health, aesthetics, religion or moral beliefs. You can replace the loss of protein in your diet with food like nuts, beans and quorn.

A lacto-ovo vegetarian is what most people think of when someone says they're "a vegetarian." It means they do not eat meat, poultry or fish but they do eat both eggs and dairy products. It is the most common type of vegetarianism.

Ovo-vegetarian means they don’t eat meat, poultry, fish or dairy products but they do eat eggs.

A pescetarian is someone who does not eat meat or poultry but they do eat fish, eggs and dairy products.

Vegan means to avoid eating or drinking all animal products. A vegan doesn't eat eggs, dairy products or even honey. They also avoid buying anything made from animal products, such as leather, fur, wool and silk.