Is eating well a luxury? A new book investigates how big companies have formulated junk food to make it addictive. Some experts claim that it cannot be called food at all.
Food industry is killing us warns top doctor
Crisps: People take in an extra 17 calories a minute when eating ultra-processed food. Glossary
Protein - Large biomolecules made of up amino acids, which in turn are made up of DNA.
Synthetic - An artificial substance or material. It is made by humans using chemical processes, rather than occurring naturally.
Calories - The amount of energy released when your body digests and absorbs food. The more calories a food has, the more energy it gives your body.
Diabetes - A medical condition causing there to be too much sugar in the blood.
Obesity - The medical condition of being very overweight. There are many ways of measuring this, including a BMI of 30 or more. (You can work out your BMI by dividing your weight in kilograms by your height in metres squared.)