How do I naturally enhance my body's immune system? Foods That Weaken the Immune System. White bread, cakes, pastries, plus other baked foods made with cream, refined flour (as opposed to whole-grain flour) are almost devoid of dietary fiber, folate, click here and many other nutrients. Just what food items can weaken the body's immune system? Best Foods for Boosting The Immune System of yours. How can you repair a weak immune system? What...