Polyunsaturated fat: A class of fats with long carbon chains and two or more double bonds (C=C) that are not saturated with hydrogen atoms. Polyunsaturated fats lower blood cholesterol when they replace saturated fats.
The Seven Countries Study
The Seven Countries Study (SCS for short) is the first major study to investigate diet and lifestyle along with other risk factors for cardiovascular disease, across contrasting countries and cultures and over an extended period of time. Read more about this study.