Scientific Opinion on the substantiation of health claims related to eicosapentaenoic acid (EPA) and enhancement of mood (ID 633), calming (ID 634), increased attention (ID 634), increase in appetite after unintentional weight loss leading to an increase in energy intake (ID 635), and protection of blood lipids from oxidative damage (ID 636) pursuant to Article 13(1) of Regulation (EC) No 1924/2006:EFSA-Q-2008-1420 , EFSA-Q-2008-1421 , EFSA-Q-2008-1422 , EFSA-Q-2008-1423