If you have a common cold, you can eat grapefruit.

Grapefruit is rich in vitamins and can enhance the body's immunity and its ability to resist viral colds. You can eat some grapefruit in moderation during a cold, but it is not recommended to consume too much as it can burden the gastrointestinal tract. During a cold, the body is relatively weak, so it is important to eat a light and reasonable diet, consume more light fruits and vegetables, and avoid overly greasy, spicy, and irritating foods.