In the absence of allergies, one-week-old babies can eat pineapple. Pineapple is rich in nutrients, containing protein, sugar and vitamin A, vitamin C, potassium, phosphorus, iron, calcium and other vitamins and trace elements, which can supplement a variety of nutrients, and is conducive to promoting the growth and development of the organism, so one-week-old babies can eat pineapple. But pay attention to the right amount, do not take in too much at once. If you are allergic to pineapple, avoid eating it, so as not to cause rashes, itchy skin and other allergic reactions. In general, we should develop good eating habits, regular diet, pay attention to dietary diversity, avoid picky eating or partiality, to ensure balanced nutrition.