Special dynamic effects of food

What are the special dynamic effects of food?

Everyone is unfamiliar with the term "food's special power" and doesn't know what it means. They wonder if food can push things? In fact, the special power of food refers to the thermal effect of food, that is, the energy consumed by the human body in the process of digestion and absorption of food after eating it. Are female friends who want to lose weight interested in this explanation? Do you all want to know what the special dynamic effects of food are? Let me introduce it to you below.

Specific dynamic effect of food

Thermal Dynamic Action (SDA), also known as the thermal effect of food, refers to the phenomenon that the body's energy consumption increases due to food intake, that is, it refers to the energy consumed in the digestion, absorption, and metabolic transformation of food during the eating process.

1. It has nothing to do with eating

The specific dynamic effect of food has nothing to do with the total calories eaten, but is related to the type of food. The effect of eating sugar and fat on metabolism is relatively small, only about 4% of the basal metabolism, and the duration is only about 1 hour. However, the effect of eating protein on metabolism is greater, which can reach 30% of the basal metabolism. The duration is also longer, sometimes up to 10 to 12 hours. The mechanism of the special dynamic effect of food is the energy consumption of food during digestion, absorption and metabolism. For example, the activity of certain enzymes increases, certain substances are actively transferred between cells and interstitium during metabolism, and the energy consumption of amino acid deamination becomes more obvious. Krebs once reported that the increase in energy consumption caused by the special dynamic effect of protein was related to the production of urea in the body; Cairnie et al. also observed a parallel increase in heat production and nitrogen excretion in animal experiments on femoral fractures, and believed that this was due to the increase in amino acid metabolism caused by the decomposition of tissue protein. However, the experiment conducted by Garrow et al. cannot show that the increase in metabolic rate after a meal has any relationship with the production of urea.

2. Metabolic Rate

Regarding the special dynamic effect of food when the human body is working, some people have found in experiments that it is almost twice that when the human body is at rest. Because of this, when the human body is working or exercising, the body not only needs to supply oxygen to the moving skeletal muscles, but also consumes oxygen in the heat production process affected by food. The burden on the oxygen supply system is increased, affecting the body's endurance. How to prevent the human body from this extra burden while maintaining optimal energy supply, so the special dynamic effect of food is still a topic that needs further research. The specific dynamic role of food in the calculation of energy requirements is still unclear and inconsistent. First of all, the type of food. What proportion of the increased energy consumption caused by food should be accounted for in the heat energy requirement? Secondly, how should it be calculated under labor conditions? It is generally believed that for people with high-protein eating habits, the special dynamic effects of food account for about 10% of the total calories. Chinese nutritionists advocate that the special dynamic effects of food in a general diet account for about 6% of the total energy requirement.

The specific dynamic effect of food has nothing to do with the total calories eaten, but is related to the type of food. The effect of eating sugar and fat on metabolism is relatively small, only about 4% of the basal metabolism, and the duration is only about 1 hour. However, the effect of eating protein on metabolism is greater, which can reach 30% of the basal metabolism. The duration is also longer, sometimes up to 10 to 12 hours. The mechanism of the special dynamic effect of food is the energy consumption of food during digestion, absorption and metabolism. For example, the activity of certain enzymes increases, certain substances are actively transferred between cells and interstitium during metabolism, and the energy consumption of amino acid deamination becomes more obvious. Krebs once reported that the increase in energy consumption caused by the special dynamic effect of protein was related to the production of urea in the body; Cairnie et al. also observed a parallel increase in heat production and nitrogen excretion in animal experiments on femoral fractures, and believed that this was due to the increase in amino acid metabolism caused by the decomposition of tissue protein. However, the experiment conducted by Garrow et al. cannot show that the increase in metabolic rate after a meal has any relationship with the production of urea.