Someone said :
yeah if u stay away from sat fat you wont put on as much weight and less sat fat is good for your heart and less salt is always good but dont you need a certain amount of calories in your "balanced diet"
Actually, latest consensus is that saturated fats aren't as evil as previously thought. http://www.independent.ie/health/diet-fitness/saturated-fat-may-n etc ...
Nutrition seems to b a fairly complex matter, and our bodies were finely tuned to fun on the foods available to our early ancestors. Its the artificial processed crap that does damage, as well as things like wheat etc (which cause massive insulin related problems) thst does the damage in my book. Stick to the stuff we were meant to eat - fruit, veg, fish, meats - and avoid processed foods that are bodies weren't intended for.