Why Sugar Might Make You Sick Longer

September 28, 2026

Could too much sugar make it harder for your body to fight off a cold or infection? Registered dietitians Leah Kleinschrodt and Teresa Wagner explain the connection between added sugar, elevated blood sugar, and immune function. Learn why whole fruit is different from sugary drinks, which nutrient-dense foods support your immune system, and practical ways to cut back on added sugar and nourish your body during cold and flu season.