Good nutrition boosts your immune system, as does cutting down on salt and salty food. - Above all, do not lower your resistance by dieting. - If you need to lose excess weight you can do so easily, without dieting; you need to reduce salt intake, not calorie intake, in order to lose excess weight.
Lose weight and improve your health in many other ways without drugs, hunger or expense by eating less salt/sodium! - Try it! - You will feel so much better!
Read my Mensa article on Obesity and the Salt Connection