10 Ways You Weaken Your Immune System

Several types of white sugar - refined sugar and granulated sugar

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7. Sugar

You knew this one would be here, right? Everyone knows sugar is not good for you, but did you know that sugar decreases your immunity to illnesses? Just 100 grams of sugar (which is only about 2.5 cans of soda) can reduce the ability of your white blood cells to kill off bacteria by as much as 40 percent!

Like alcohol, the more sugar you eat, the more damage you are doing to your immune system.

The negative effects of sugar begin to suppress your immune system just 30 minutes after consumption and last about 5 hours, so think twice before you pop that jelly doughnut into your mouth tomorrow morning.

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