SalmonOily fish like salmon (along with tuna and mackerel) pack a double whammy: a great source of protein, and one of the best sources of omega-3 fatty acids. Oily fish can help slow digestion, regulate blood sugar and reduce food cravings. Choose tinned wild salmon, not the smoked kind.Extra virgin olive oilThe basis of the much heralded ‘Mediterranean diet’, olive oil is packed with health benefits, not least being the fat burning and colesterol reducing properties of mono unsaturated fat. Make sure you choose the extra virgin variety though, and drizzle it – don’t fry with it.BerriesChose berries that are blue or red in colour (blueberries, blackberries, acai berries, cherries). They’re fibre rich and crammed with nutrients.