Omega-3 fatty acids are a form of polyunsaturated fats found primarily in
fish, fish oils, vegetable oils, and leafy green vegetables. They seem to reduce
the risk of stroke and heart attack.
Source: GreenFacts
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Polyunsaturated fats are one of four basic types of fat that the body derives
from food. The other three are cholesterol, saturated fat, and monounsaturated
fat.
