Unlike aspirin, which also helps to reduce blood clotting but has side effects such as inflammation and bleeding in the intestinal tract, the effects of regular kiwi consumption are all beneficial. Kiwifruit is an excellent source of vitamin C, and polyphenols, and a good source of potassium, all of which may function individually or in concert to protect the blood vessels and heart. In one study, human volunteers who ate 2 to 3 kiwifruit per day for 28 days reduced their platelet aggregation response (potential for blood clot formation) by 18% compared to controls eating no kiwi. In addition, kiwi eaters' triglycerides (blood fats) dropped by 15% compared to controls.