Since humans cannot synthesise carotenoids de novo, we depend upon the diet
exclusively for the source of these micronutrients. Although the necessity
for beta-carotene. as the precursor of vitamin A has been recognised for m
any years, it is lycopene that has attracted substantial interest more rece
ntly. Lycopene is the red-coloured carotenoid predominantly found in tomato
fruit, but in few other fruits or vegetables. It has claimed that it may a
lleviate chronic diseases such as cancers and coronary heart disease. This
possibility has been studied extensively, by epidemiological studies and bi
ochemical investigations of its properties and its bioavailability from tom
ato-based diets. This article summarises the current state of knowledge of
the properties of lycopene. its possible role in human health and areas for
future research. (C) 2000 Elsevier Science Ltd. All rights reserved.