Scientific Opinion on the substantiation of health claims related to Camellia sinensis (L.) Kuntze (tea), including catechins from green tea, and contribution to the maintenance or achievement of a normal body weight (ID 1107, 1112, 1544, 2716), increased beta-oxidation of fatty acids leading to a reduction in body fat mass (ID 1123, 1124, 3698), and maintenance of normal blood glucose concentrations (ID 1115, 1545) pursuant to Article 13(1) of Regulation (EC) No 1924/2006