- Flavonoids Linus Pauling Institute
What are anthocyanidins?
Anthocyanidins are nonessential nutrients that belong to flavonoids. Examples include cyanidin, delphinidin, malvidin, pelargonidin, peonidin and petunidin. They are phytonutrients found in plant foods, mainly in fruits.
Foods (Fruits) High in Anthocyanidins
- FRUITS: red, blue and purple berries (bilberry, black currants, blueberry, elderberry, raspberry, strawberry), red and purple grapes 
- OTHER: red wine 
Anthocyanins are poorly absorbed .
Anthocyanins as Food Additives
Anthocyanins may be used as colors in commercial foods. In the European Union, they are labeled as E-number E163.
Anthocyanidins as Supplements
Nonprescription (over-the-counter) bilberry, black currant, blueberry, elderberry and red grape red grape extracts, which are high in anthocyanins, are available .
Anthocyanidins Health Benefits
There is INSUFFICIENT EVIDENCE about the effectiveness of anthocyanins in the prevention or treatment of cancer, diabetes, heart disease or in improving visual acuity, slowing aging or as antioxidants .