The sugar industry began funding research that cast doubt on sugar’s role in heart disease — in part by pointing the finger at fat — as early as the 1960s, according to an analysis of newly uncovered documents. The analysis published Monday is based on correspondence between a sugar trade group and researchers at Harvard University, and is the latest example showing how food and beverage makers attempt to shape public understanding of nutrition. In 1964, the group now known as the Sugar Association internally discussed a campaign to address “negative attitudes toward sugar” after studies began emerging linking sugar...