Some foods are considered to be superfoods – foods that may prevent diseases and improve mental¹ as well as physical² health. Foods that are often listed as superfoods include:

• Blueberries: may improve short-term³ memory and slow⁴ the ageing process⁵.
• Apples: a good source⁶ of vitamin C; they can also lower⁷ cholesterol.
• Spinach: high in vitamin A; it can boost⁸ the immune system.
• Vegetable juice (especially tomato): can reduce the risk⁹ of heart disease.

There has been a sharp rise¹ in the number of children who are obese². Childhood obesity is now a major³ problem. Children often take too little exercise.

Keeping fit need not be difficult. You can maintain⁵ a good level of fitness with a simple routine of daily exercise. Start exercising now!

People often do not realise how stressful their jobs are. Stress can cause high blood pressure, increased risk of heart attacks and depression⁴.

Bad habits can cause serious harm⁶ to the body. Alcohol and tobacco are particularly harmful if consumed in large quantities over a long period.

Language help
The nouns food and fruit can be both uncountable and countable. When we refer to food and fruit in general we use the uncountable form (e.g. That restaurant serves good food / I love fruit). The plural forms, foods/fruits, are used to refer to individual types or examples of food (e.g. fatty foods, citrus fruits). We always use fish in the singular.