I’ve been taught since my undergraduate days in medical college that eating saturated fats was to ask for trouble. Meat (red or white), cheese, butter and egg yolk were prohibited. Repeated guidelines from the American Heart Association (AHA), the American College of Cardiology and even the World Health Organisation were clear that fats in general, and saturated fats in particular, were to be strictly avoided to prevent a heart attack. The message was to reduce fats to less than 30% of the total calories consumed in a day, and with saturated fats to be kept well below 10%. Why, most people on the planet followed these dietary commandments from the two most powerful and respected cardiology associations.