advantage Novel proteins are used as pet food for animals that have developed allergies to common protein sources
genetic engineering accomplishes is giving plants, fruits, and vegetables a much longer shelf life. They retain their nutrients for longer and stay fresh for extended periods of time. This helps to reduce the amount of food waste.
disadvantage
When you begin to alter and change the genes a person, the ones that they are naturally born with, you run the risk of these genes overly mutating. Once this happens, entirely new illnesses and disease could show up in the race, ones that we are not yet equipped to handle or treat.
hope this helps