Table 1.

Classification, structure, bioactivities and sources of flavonoids [21,22,23,24,25,26,27].

Flavonoid	Structure	Bioactivities	Sources	Ref.
Chalcones		Antioxidant, antimalarial, anti-inflammatory, antimicrobial, antiosteoporosis, antiplasmodial, anticancer, antifungal, and antihyperglycemic	Plants: Buteamonospermia, Humuluslupulus, Helichrysumrugulosum, Neoraputiamagnifica, Angelicakeiskei, Piperhispidum, Tarennaattenuata, and Calythropisaurea	[21]
Flavanones		Antioxidant, anti-inflammatory, and anti-ischemic	Citrus (grapefruit, orange, and lemon) and tomatoes	[22]
Flavones		Antitumor, antiviral, antimicrobial, anti-inflammatory, antioxidant, neuroprotective, anti-IR-insulin resistance activity, and hepatoprotective	Plants: Godmaniaaesculifolia, Tridaxprocumbens, Primulafarinosa L., and Chrysanthemummorifolium	[23]
Leucoanthocyanidin Flavan-3,4-ol		Antioxidation, anti-inflammatory, anticancer, antiviral, and protective cardiovascular properties	Plants: Acaciapeuce, A. carneorum, and A. crombiei	[24]
Flavonols		Antioxidant, anticancer, anti-inflammatory, hepatoprotective, neuroprotective, cardioprotective, antimicrobial, and iron-chelating	Berries, citrus fruits, spices, black or green tea, capers, arugula, cabbage, kale, cress, watercress, sea buckthorn, parsley, and carob	[25]
Proanthocyanidin flavan-3-ol		Antifungal, antiviral, anti-inflammatory, anticancer, antiangiogenic, and protective against neurological and heart diseases	Tea, grapes, and wine	[26,27]