The Dark Side of America's Favorite Health Food Revealedhttp://articles.mercola.com/sites/articles/archive/2005/03/23/soy-part-ten.aspx1. In terms of their effects on people‘s health, which of the soy food products on the market would you say are the worst? The worst by far is soy formula because it‘s usually the only food nourishing the developing baby. Soy formula contains phytoestrogensenCommunityServer 2008.5 SP1 (Build: 31106.3070)