Dietary energy central storage

How are energy substances stored?

Storage and utilization of energy substances involve two different controlling processes. In advanced animals, glucose is stored in the form of hepatic and muscle glycogen, and glycogen is re-used by phosphorolysis. Fatty acids are stored in the form of fat, especially hypodermic fat, and provide energy to the body through β-oxidation.

How is energy stored in the body?

Energy is stored in the form of fat, and meets the demand of body via two coupled mechanisms: catabolism and oxidative phosphorylation. Under normal physiological conditions, fat consumption involves ketone body metabolism through the circulatory system and glucose consumption requires blood lactic acid cycle.

Where does dietary energy come from?

Most dietary energy comes from dietary fat, protein, and carbohydrate. Dietary energy is used by the body directly and indirectly through conversion to high-energy bonds in ATP to fuel all activities.

What is long-term energy storage?

Long-term energy storage only involves conversion of glucose into fat, and this fat is majorly stored subcutaneously, especially under the belly. This storage method is of vital significance for biological adaptation, which not only provides energy to the body in the cold season when food shortage occurs but also effectively prevents heat loss.

How is energy stored in human beings in the form of fat?

In other words, the energy stored in human beings in the form of fat can only be decomposed through energy consumption and circulated in the form of ketone bodies. The major component of ketone bodies is β-hydroxybutyrate (β-OHB), which is an energy molecule from fat and is circulated in animals in vivo.

Do food-derived nutrients contribute to energy sustenance?

However, the pervading idea of almost any food-derived nutrient contributing effectively to our energy sustenance, with (almost) full substitution possibilities (as energy fuels) between carbohydrates, fats, protein (and even alcohol) is deeply rooted.