There are enough real problems in life without creating problems where none exist. Take diet, for instance: a subject rife with fads and fallacies. What could be simpler than just eating sensibly — a balanced and varied diet, everything in moderation, lots of fresh fish, fruit and vegetables, meat but not to excess, an awareness of the dangers of too much fat, sugar and salt? Within these guidelines I eat what I want and have never bought a diet book in my life. Food is meant to be enjoyed, not agonised over. Diet books make money for publishers first and foremost; they are not blueprints for an eternal healthy life.
See this Observer article about why almost everything we've been told about unhealthy foods is wrong.