Babies may experience poor mood due to calcium deficiency, and it is recommended to supplement calcium. Consuming yogurt can also increase calcium absorption and regulate intestinal function. In daily meals, adding age-appropriate complementary foods such as congee, egg yolks, and fruit purees can be beneficial. For babies aged 4-6 months, these can be introduced, while for those aged 7-12 months, soft noodles, egg custard, tofu, rice dishes, various chopped vegetables, fish meat, and minced lean meat can be added. Start with grains and gradually transition to vegetables, fruits, fish, poultry eggs, and soy products. You can also choose some baby nutritional complementary food products as supplements.