cirrhosis
A disease of the liver, often caused by drinking a large amount of ethanol (alcohol) over a long period of time.
deficiency disease
A disease caused by a lack of a particular nutrient in the body, such as anaemia caused by a lack of iron.
drug
A substance that we take into the body, which affects how the body works.
genetic disorder
A disease caused by faulty alleles of our genes.
malnutrition
Health problems caused by a diet that contains too little or too much of one or more nutrients.