The worlds best antioxident

A comparative analysis reported that açaí had intermediate antioxidant potency among a variety of frozen juice pulps tested. Antioxidant potency was: acerola > mango > strawberry > grapes > açaí > guava > mulberry > graviola > passion fruit > cupuaçu > pineapple.[5]

A powdered preparation of freeze-dried açaí fruit pulp and skin was shown to contain anthocyanins (3.19 mg/g), including cyanidin 3-glucoside and cyanidin 3-rutinoside,[2] yet the contribution of anthocyanins to overall antioxidant capacity of açaí is only about 10%.[6] The powdered preparation was also reported to contain twelve flavonoid-like compounds, including homoorientin, orientin, taxifolin deoxyhexose, isovitexin, scoparin, as well as proanthocyanidins (12.89 mg/g), and low levels of resveratrol (1.1 μg/g).[2]

In a study of different açaí varieties for their antioxidant capacity, a white species displayed no antioxidant activity against different oxygen radicals, whereas the purple variety most often used commercially was excellent against peroxyl radicals, good against peroxynitrite and poor against hydroxyl radicals.[6]

Freeze-dried açaí powder was found to have high antioxidant activity against superoxide (1614 units/g) and peroxyl radicals (1027 μmol TE/g) and milder activity for peroxynitrite and hydroxyl radicals.[7] The powder was reported to inhibit hydrogen peroxide-induced oxidation in neutrophils, and to have a slight stimulatory effect on nitric oxide production by lipopolysaccharide-stimulated macrophages in vitro.[7]

Extracts of açaí seeds were reported to have antioxidant capacity against peroxyl radicals, similar to the capacity of the pulp, with higher antioxidant capacity against peroxynitrite and hydroxyl radicals.[8]