Tangerine peel could fight against certain cancers, such as breast, lung, prostrate and ovarian cancer, the scientists said.

A compound contained in tangerine peel, Salvestrol Q40, destroys human cancer cells, which contain an enzyme called P450 CYP1B1, scientists at Leicester School of Pharmacy found.

The findings may offer a new approach to uncovering a treatment for cancers. The research was still in its early days and many tests will be needed before reaching the clinical trial stage, which could take between five and seven years.

Medicinal chemist Dr. Hoon L. Tan said: "It is very exciting to find a compound in food that can target cancers specifically.

"Salvestrols may offer a new mechanism of dietary anti-cancer action.

He said that since many people no longer eat the skin of fruits this could be a major contributory factor to the increasing incidence of some cancers.