As nouns the difference between anthocyanin and proanthocyanin
is that anthocyanin is any of many water-soluble red to violet plant pigments related to the flavonoids while proanthocyanin is any glycoside of a proanthocyanidin.
anthocyanin
Noun
(
en noun)
(organic chemistry) Any of many water-soluble red to violet plant pigments related to the flavonoids.
Synonyms
* when used as a food colouring
See also
*anthocyanidin