When you have a cold, you can eat vitamin C in moderation. Colds are usually caused by viruses, bacteria or pathogenic microorganisms such as mycoplasma and chlamydia infecting the respiratory system, and vitamin C can inhibit viral proliferation, improve the bactericidal ability of cells, and improve the body’s ability to fight disease. Other dietary recommendations when you have a cold are as follows: 1, you can also eat some vitamin C-rich vegetables and fruits, such as apples, bananas, oranges, kiwi, dragon fruit, spinach, bok choy, bok choy, greens, lettuce leaves, etc.; 2, eat some well-digested and nutritious food, don’t eat spicy and stimulating, greasy, cold food, and don’t overeat.