Cacao is an evergreen tree, native to the tropical regions of Central and South America. Major producers are Ghana, South America and the West Indies. Cacao seeds are soaked in water and then dried after fermentation. This gives the seeds a red color

Beetroots belong to the Chenopodiaceae family and are variants of sugar beets. Its root epidermis is red and the root flesh bears a crimson color. It is cultivated in countries such as the Americas, Russia, Eastern Europe, Israel and Sudan. As with s

Dr Catherine Tsang, who took part in research, said: Our research specifically looked at Purple Majesty potatoes which, unlike white potatoes, contain a natural pigment called anthocyanins. It's this pigment that gives the potato the purple appearanc

Annatto extract is obtained from red seed casings of Bixa orellana a deciduous shrub that grows to a height of up to 3 metres, found native to Central and South America. Bixa orellana is widely cultivated in the tropical regions, whose major producer