| MadSci Network: Botany |
Red or purple grape juice contains pigments called anthocyanins, that are present in the cell vacuole. There is recent interest in using grape anthocyanins to color breakfast cereals. Anthocyanins change color with the pH.
Anthocyanins extracted from red or purple cabbage are often used as a pH indicator in elementary school classes.
Anthocyanins are antioxidants and are considered beneficial in the human diet.
References
Mastering the Morning: Creating Breakfast Cereals (Added 8/27/2006).
(link defunct, 8/27/2006: http://www.preparedfoods.com/archives/2000/2000_08/0008dpro.htm) Fruity Breakfast Cereal Colorants
Re: Where do fruits and vegetables get their color?
Purple grape juice may stain lips but can help heart: study
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