Vipeholm experiments
The Vipeholm experiments or Vipeholm Study (Swedish: Vipeholmsexperimenten) were a series of human experiments where patients of Vipeholm Hospital for the intellectually disabled in Lund, Sweden, were given various amounts of sweets to eat, including "extra sticky toffee" (that was specifically manufactured for the study without certain ingredients so that the toffee would stick longer to tooth surfaces) to provoke dental caries. The experiments were sponsored both by the sugar industry and the dentist community, in an effort to determine whether carbohydrates affected the formation of cavities.