Popsugar Fitness Immune System What to Eat When You're Sick 7 Foods to Eat When You're Sick 11 December, 2018 by Michele Foley View On One Page Photo 4 of 7 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Infection-Fighting Glutathione Glutathione is a powerful antioxidant that has been shown to fight infection. It's found in red, pulpy watermelon and also cruciferous veggies like broccoli, collard greens, kale, and cabbage. Previous Next Start Slideshow Immune SystemColdsFlu