Kiwifruit also appear to benefit immune function. Preschoolers randomized to eat gold kiwifruits every day appeared to cut their risk of contracting a cold or flu-like illness nearly in half compared to those randomly selected to eat bananas instead.22 A similar experiment was tried on elderly individuals, another high-risk group. Those in the banana control group who got an upper-respiratory-tract infection suffered for about five days with a sore throat and congestion, compared to the kiwifruit eaters, who felt better after just a day or two.