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12. Beta-carotene - found in high concentrations in butternut squash, carrots, orange bell peppers, pumpkins, kale, peaches, apricots, mango, turnip greens, broccoli, spinach, and sweet potatoes.Beta-carotene Canthaxanthin Lutein - found in high concentration in spinach, kale, Swiss chard, collard greens, beet and mustard greens, endive, red pepper and okraLutein LycopeneLycopene - found in Alpha-carotene - found in carrots, winter squash, tomatoes, green beans, cilantro, Swiss chardAlpha-carotene Astaxanthin - found naturally in red algae and animals higher in the marine food chain. It is a red pigment familiarly recognized in crustacean shells and salmon flesh/roe.Astaxanthinred algae high concentration in cooked red tomato products like canned tomatoes, tomato sauce, tomato juice and garden cocktails, gauva and watermelons. Zeaxanthin - best sources are kale, collard greens, spinach, turnip greens, spinach, Swiss chard, mustard and beet greens, corn, and broccoliZeaxanthin

13. FlavonoidsFlavonoids, a subset of polyphenol antioxidants, are present in many berries,polyphenol antioxidantsberries as well as in coffee and tea.coffeetea FlavonesFlavones: ApigeninApigenin Luteolin TangeritinLuteolinTangeritin FlavonolsFlavonols: IsorhamnetinIsorhamnetin Kaempferol Myricetin - walnuts are a rich sourceKaempferolMyricetinwalnuts ProanthocyanidinsProanthocyanidins, or condensed tannins Quercetin and related, such as rutintanninsQuercetinrutin Flavanones: Eriodictyol HesperetinHesperetin (metabolizes to hesperidin) Naringenin (metabolized from naringin)hesperidinNaringeninnaringin Flavanols and their polymers: CatechinCatechin, gallocatechin and their corresponding gallate estersgallocatechingallate EpicatechinEpicatechin, epigallocatechin and their corresponding gallate estersepigallocatechin TheaflavinTheaflavin its gallate esters ThearubiginsThearubigins IsoflavoneIsoflavone phytoestrogens - found primarily in soy, peanuts, and other members of the Fabaceae familyphytoestrogens DaidzeinDaidzein Genistein GlyciteinGenisteinGlycitein StilbenoidsStilbenoids: ResveratrolResveratrol - found in the skins of dark-colored grapes, and concentrated in red wine. PterostilbenePterostilbene - methoxylated analogue of resveratrol, abundant in Vaccinium berriesVaccinium Anthocyanins CyanidinCyanidin Delphinidin Malvidin Pelargonidin Peonidin PetunidinDelphinidinMalvidinPelargonidinPeonidinPetunidin

14. Other potential organic antioxidants CapsaicinCapsaicin, the active component of chili peppers BilirubinBilirubin, a breakdown product of blood, has been identified as a possible antioxidant. [5] [5] Citric acidCitric acid, oxalic acid, and phytic acidoxalic acidphytic acid N-Acetylcysteine, water solubleAcetylcysteine R-α-Lipoic acid, fat and water solubleLipoic acid Uric acidUric acid, in humans, accounts for roughly half the antioxidant capacity of plasma. [citation needed]citation needed FructoseFructose, which is found abundantly in fruits, significantly elevates uric acid levels in humans, [6] and thus indirectly increases antioxidant capacity. High levels of uric acid may be a protective factor against Parkinson's disease [7] and possibly other diseases related to oxidative stress. [citation needed] [6] [7]oxidative stresscitation needed