Recently, Walgreens’ Well Beginnings infant formula was reported to contain engineered hydroxyapatite (HA) nanoparticles, according to independent laboratory testing commissioned by Friends of the Earth. This is important because an expert committee of the European Union concluded that nano-HA may be toxic to human cells and should not be used in products. As You Sow , which advocates on behalf of shareholders for corporate responsibility on health and environmental issues, raised this concern to Walgreens in the form of a letter, and then an official shareholder resolution seeking more...