Health.

Human health is affected by inherited factors:

Our cholesterol levels and the likelihood of suffering from heart disease depend on genetics aswell as our diet.

Human health is also affected by environmental factors:

Obesity is caused by having  higher energy intake than the energy used in exercise

To have a healthier diet we should :

• Reduce intake of foods high in sugar, salt and fat.
• Increase intake of fruit and vegetables.
• Try to do physical exercise at least twice a week.

Benefits of fruit and vegetables:

• Lower chance of developing cardiovascular diseases.
• Lower chance of developing bowel and lung cancer.
• Lower chance of developing obesity and type 2 diabetes 

Poor diet contributes to many health problems:

Obesity = caused by taking in too much energy (sugar , starch or fat)

Heart disease = caused by cholesterol and fatty substance build up on artery walls. Over time this leads to narrowing of the arteries making it more difficult for blood to flow through them. This may result in a heart attack.

High blood pressure = Obese people often have high blood pressure. This is when the heart has to work harder to pump the blood around the extra tissues in the body.This can harm the heart or the blood vessles. Poor diet can lead to narrowing of the arteries causing high blood pressure. Too much salt is also another factor.

Diabetes = A poorly balanced diet or obesity can lead to type 2 diabetes. In type 2 diabetes the body suffers sugar "overload" and the insulin stops being effective in controlling the blood glucose levels.