Kelp may be eaten in small amounts after flu vaccination if there is no previous food allergic reaction to kelp. If the patient has a previous food allergic reaction to kelp or cannot be clarified, kelp should not be eaten. 1. Kelp is rich in protein and minerals, which can supplement iodine for the body, thus helping to promote the development of children’s height and prevent iodine deficiency thyroiditis. 2. In addition, kelp contains plant fiber, can help improve constipation, reduce blood pressure, etc., through dietary regulation can better promote health. 3. Therefore, if there are no food allergies or contraindications to kelp after the vaccination, you can consume a small amount of kelp, such as cold, soup and so on are good choices.