Glucosinolate levels in leaves were determined in a collection of 113 varieties of turnip greens (Brassica rapa L.) from northwestern Spain grown at two sites. Sixteen glucosinolates were identified; being the aliphatic glucosinolates; gluconapin and glucobrassicanapin the most abundant. Other aliphatic glucosinolates; such as progoitrin; glucoalyssin; and gluconapoleiferin were relatively abundant in varieties with a different glucosinolate profile (Padilla et al. 2007).