アメリカについては、どこから調べればいいのかなぁ?とりあえず、NIH-national institute of health-国立衛生研究所で、検索をかけました。すると、NICHD-national institute of child health & human developmentという部門が子供について扱っているようで、そこから飛んだのがkidshealth.orgというページです。ここは財団が作っているwebで、子供の健康についての情報が掲載されており、医師の監修もついているようです。 そこに
This is the time when most infants are introduced to solid foods. The American Academy of Pediatrics (AAP) currently recommends gradually introducing solid foods when a baby is about 6 months old. Your doctor, however, may recommend starting as early as 4 months depending on your baby's readiness and nutritional needs. Be sure to check with your doctor before starting any solid foods.(参照 http://kidshealth.org/parent/pregnancy_newborn/feeding/feed47m.html)
そして、 Do not give eggs, cow's milk, citrus fruits and juices, and honey until after a baby's first birthday.
1歳までは卵、牛乳、柑橘類(ジュースも)、はちみつはあげないこと
Fish and seafood, peanuts and peanut butter, and tree nuts are also considered allergenic for infants, and shouldn't be given until after the child is 2 or 3 years old, depending on whether the child is at higher risk for developing food allergies. A child is at higher risk for food allergies if one or more close family members have allergies or allergy-related conditions, like food allergies, eczema, or asthma.