Bisphenol A (BPA) has long been used in the plastics industry to harden polycarbonates and epoxy resins. Chemically it resembles oestrogen, and because it is contained in the plastic used for baby bottles, for years there have been concerns about potential harms. These concerns extend beyond possible hormonal effects to include, among others, harm to the developing nervous system.

It has been known for a long time that attention deficit hyperactivity disorder (ADHD) is more prevalent in children who were bottle-fed. There are obvious nutritional and psychosocial determinants at play here, but …