Water is the most important part of the body, accounting for about 50%- 60% of the body weight, followed by fat. Others are protein contained in muscles, sugar and inorganic substances contained in bones. Body fat rate refers to the ratio of body fat to body weight.
Extended data 1, supply of fat: there is no supply standard for fat. Due to the differences in economic development level and eating habits in different regions, the actual intake of fat varies greatly. The Nutrition Society of China suggested that the dietary fat supply should not exceed 30% of the total energy, and the ratio of saturated, monounsaturated and polyunsaturated fatty acids should be 1: 1: 1. The energy provided by linoleic acid can reach 1%~2% of the total energy, which can meet the needs of human body for essential fatty acids.
2. Sources of fat: The main sources of fat are edible oil and the grease contained in the food itself. Table 5 shows the fat content in several foods. As can be seen from the figures in the table below, the fat content of nuts is the highest, all kinds of meat are in the middle, and the content of rice, flour, vegetables and fruits is very small.
References:
Baidu encyclopedia-pang