Although honey seems like a wholesome and natural food to give your infant, don’t do it until after they’re at least 12 months old. Honey can contain spores of a bacterium called Clostridium botulinum, which can germinate in a baby’s immature digestive system and cause infant botulism, a rare but potentially fatal illness.

These spores are usually harmless to adults and children over 1 year old, because the microorganisms normally found in the intestine keep the bacteria from growing.

To be on the safe side, don’t cook with honey (in baked bread or pudding, for example) if your baby is going to be eating the finished dish. While the toxin is heat sensitive, the spores are difficult to kill. Commercial foods that contain honey, like ready-to-eat breakfast cereals and baby food, are safe for your baby because they’ve been heated enough to kill the spores.