How effective is similac alimentum?

Variable: Alimentum is a hypoallergenic formula that is highly effective to support growth and nutrition in children with hypersensitivities. Response to any particular formula can be widely variable, and recommendations are individualized by your child's doctor.

Puzzling question: Alumentum is simply a specialty formula designed to provide nutrition while avoiding food sensitivities/allergies. It does so by providing proteins that have been broken down so the body doesn't recognise their origin, thus avoiding allergic response. It is certainly capable of providing balanced nutrition for a baby for their first year or longer.