Do you mean chicken meat? Beef is the meat from a cow. Chicken isn’t so bad, but even healthy people are recommended to eat fish 2-3 times a week. Do you like salmon, mackerel, sardine etc? Fatty fish are very good for you. If you don’t usually eat it, give it a go! I’ve started eating (and enjoying) anchovies and canned sardines and that’s something I never thought I’d do! This diet really forces you to experiment to find new flavours and make your meals more interesting, so take advantage of it while you can.