Comment by ajanicij
2 days ago
That is only partly true: you don't need dietary saturated fats, but you do need essential fats (omega-3 and omega-6), which are polyunsaturated. However, sugar does not have all sorts of uses biologically; it has only one: as one (but not the only one) source of energy.
It isn't just a source, it is also a storage mechanism, both in the liver and in muscle tissue.