Isaac Asimov Quote

The first law of dietetics seems to be: if it tastes good, it's bad for you.

As quoted in: The Oxford Dictionary of Quotations (Oxford University Press, 1999), p. 30. Variant found without attribution in The New York journal of dentistry, Volume 27 (1957): "This tradition accounts for the common attitude that if something tastes good or feels good it is probably bad for you."