How much one should eat to stay fit healthy and disease-free? Consume between 20-35 percent of your calories from dietary fat increase consumption of omega-3 fatty acids and limit the intake of saturated and trans fats according to a research. According to a latest paper from the US-based Academy of Nutrition and Dietetics dietary fat for the healthy adult population should provide 20-35 percent of energy with an increased consumption of n-3 polyunsaturated fatty acids and limited intake of saturated and trans fats. “Nutritionists can help people understand that a total diet approach is more beneficial than simply reducing dietary