Highly refined carbs

Consuming highly refined carbohydrates such as white bread and sweet baked products on a regular basis may impair your immune system. These are high glycemic foods that produce a rise in blood sugar and insulin levels, perhaps leading to an increase in the generation of free radicals and inflammatory proteins like CRP.

Furthermore, a diet high in refined carbohydrates may disrupt gut flora, which might have a detrimental impact on your immune system. To boost immunological health, choose healthful, high-fiber carb sources such as starchy vegetables, oats, fruit, and legumes over processed carbohydrates.