2. The reasons are as follows:
⑴ Kiwifruit: Kiwifruit is rich in vitamin C, amino acids and anticancer substances. Eating kiwi fruit regularly can protect the heart, lower cholesterol and triglycerides, relieve fatigue, restore physical strength and improve immunity.
⑵ Onion: Onion contains flavonoids, fructan, organic sulfur and other substances, which can fight against germs and improve immunity.
(3) White radish: White radish is rich in vitamins and minerals and has a strong bactericidal effect. Eating white radish often can also improve human immunity.