Keeping up with which fat is ``flavour of the month`` and which is bad for our health is proving tricky for most consumers. Unless you have a strong understanding of the fundamentals of nutrition, most people rely on a variety of sources when it comes to finding out what we should and should not eat. As manufacturers have successfully changed recipes to be free from trans fats, companies can no longer rely on excuses such as there being no suitable alternative or that it is too expensive/difficult/time-consuming to change. Consumers are growing sceptical about the claims made by big power brands in the food industry, and manufacturers cannot afford to risk their reputation by not taking action. This month's briefing looks at the rise of essential fatty acids and the fall of the trans fats…