Name the affliction—heart disease, Alzheimer’s, arthritis, depression, asthma—and omega-3 fatty acids can help prevent it.

Or maybe not….

That is the confusion being stirred up by new research on omega-3s, fats found in cold-water fish and plant oils that have intrigued nutrition scientists ever since the 1970s discovery that Greenland Eskimos rarely die from heart disease, despite a diet of fatty fish.

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