What is the role of fats in nutrition? Surely, a much discussed issue that can be confusing. Saturated, poly-unsaturated, Ω3, Ω6, trans, lots of kinds of fats, many scientific names , a lot of information, opinions, but one thing is certain. Fats are very fatening! They are however inevitable in our diet and sometimes even necessary. That's why we have to understand their properties, in order to make the right choices in our daily life.