Port wine be labelled as "port" or "Porto". In the United States, wines labelled "port" may come from anywhere in the world, while the names "Oporto", "Porto", and "Vinho do Porto" have been recognized as foreign, non-generic names for port wines originating in Portugal. Port is produced from grapes grown and processed in the demarcated Douro region. The wine produced is then fortified by the addition of a neutral grape spirit known as aguardente in order to stop the fermentation, leaving residual sugar in the wine, and to boost the alcohol content. The fortification spirit is sometimes referred to as brandy but
Vinho Verde white Vinho Verde is very fresh, due to its natural acidity, with fruity and floral aromas that depend on the grape variety. The white wines are lemon- or straw-coloured, around 8.5 to 11% alcohol, and are made from local grape varieties Loureiro, Arinto, Trajadura, Avesso, and Azal. Vinho Alvarinho is made from Alvarinho grapes, from a small designated subregion of Monção and Melgaço. It has more alcohol (11.5 to 14%) and ripe tropical aromas. The reds are deep red and tannic, and are mostly made from Vinhão, Borraçal and Amaral grapes. The rosés are very fresh and fruity, usually made