Consumption of fruit and vegetables is mainly driven by its appearance and organoleptic properties;however they are universally promoted as healthy because of the supply of fiber,vitamins and minerals to the diet and as source of phytochemicals.Berry fruits are considering key species on bioactive compounds and with health promotion properties.They are characterized by a high content and wide diversity of phenolic compounds,represented by phenolic acid(benzoic and cinnamic acid derivatives),tannins,stilbenes and flavonoids such as anthocyanin.Polyphenols form part of a large group of phytochemicals,produced by secondary metabolism on plants to avoid photosynthesis stress derived from reactive oxygen species.Polyphenols are mostly known for their antioxidant,anti-microbial,anti-inflammatory activities and they play a role in the prevention of neurodegenerative diseases.The evaluation done in a group of six berry species including blueberries(Vaccinium corymbosum L.),raspberries(Rubus idaeus L.),blackberries(Rubus fruticosus),strawberries(Fragaria x ananassa Duchesne ex Rozier),pomegranate(Punica granatum Linn)and maqui(Aristotelia chilensis(Molina)Stuntz)demonstrated that in the cultivated species,blueberry and blackberry fruits,had the highest anthocyanin concentration but the concentration found in maqui fruit was almost four times and doubled the concentration of total phenol.These results are in agreement with the highest antioxidant activity evaluated by ferric-reducing power(FRAP assay)and by 2.2 diphenylpicrylhydrazyl(DPPH)radical scavenging capacity methods found in maqui tissue.Maqui is a Chilean native species that grows naturally as an evergreen bush therefore there are not domesticated species and the fruits are manually collected from wild species.Study of maturation process of two wild populations of maqui demonstrated that total phenol concentration declines and total anthocyanin increases during fruit development.The highest antioxidant activity was observed in more advance mature fruit.Despite the high in vitro antioxidant activity found in maqui fruits,in vivo studies are required to understand the benefit for human health.