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Sunshine, salt, sugar and fat all used to be categorized among the pleasures of life. Lately we are told that all are dangerous to our health, not as bad as smoking but worse than coffee or chocolate. There is a case for the other side in terms of health benefits. Each of the above—sugar, salt, and fat—is essential to life and health—but there is an optimal dose at which benefits are obvious, and a toxic dose at which illness develops. The same general interpretation applies to sunlight.