Maybe one reason why we are getting fatter despite all the healthy eating advice we receive is because we wildly underestimate the calories we consume (the conclusion of a scientific study reported this week).
But we certainly haven't been helped by nutrition experts advising us to avoid fats at all costs, while blithely disregarding the ever-increasing quantity of sugar we consume. Then there's carbohydrate: is it good or is it bad? What about eggs? For years, people have feared the cholesterol content – now it seems there is no correlation between the cholesterol in food and raised levels in humans.
Mary Farmer's latest nutrition blog looks at changes in healthy eating guidance, and the murky forces operating behind-the-scenes to influence the advice we receive.