The sugar industry funded animal research in the 1960s that looked into the effects of sugar consumption on cardiovascular health - and then buried the data when it suggested that sugar could be harmful, according to newly released historical documents. Stanton Glantz, a professor of medicine at U.C.S.F. and an author of the new report, said that even though the newly discovered documents are 50 years old, they are important because they point to a decades-long strategy to downplay the potential health effects of sugar consumption. "This is continuing to build the case that the sugar industry has a long history of manipulating science," Dr. Glantz said. The documents described in the new report are part of a cache of internal sugar industry communications that Cristin E. Kearns, an assistant professor at the U.C.S.F. School of Dentistry, discovered in recent years. Last year, an article in The New York Times highlighted some of the previous documents that Dr. Kearns had uncovered, which showed that the sugar industry launched a campaign in the 1960s to counter "negative attitudes toward sugar" in part by funding sugar research that could produce favorable results. The campaign was orchestrated by John Hickson, a top executive at the sugar association who later joined the tobacco industry. Mr. Hickson secretly paid two influential Harvard scientists to publish a major review paper in 1967 that minimized the link between sugar and heart health and shifted blame to saturated fat.