Dear Johan
I trust that you have consulted a medical dr or even a specialist (Neurologist) about your migraines and that the dr has a) determined what factors are causing your migraines and if foods/drinks play a role or not, b) prescribed the necessary medication to treat the migraines. If your migraines are triggered by certain foods or beverages (e.g. mature cheeses, biltong, red wine, caffeine), then you will need to avoid them when you are on a slimming diet. To lose weight you need to basically change your lifestyle. Reduce your energy intake by eating an energy-reduced, low-fat, high-fibre diet (click on 'Diet' at the top of this page, 'Weight loss', ‘Balanced diet' and then on 'Slimming Diet' for a copy of such a diet), and increasing your energy output by doing regular exercise (running, jogging, skipping, cycling, swimming, join a gym or Walk for Life). Check with the dr who is treating your migraines if you are allowed to do exercise.
Best regards
DietDoc