Question

Describe the pathway for the energy nutrients when each is consumed in excess. Note how each will effect the fuel mix.

Answer 1

Ans) Protein: excess can be used to make fat.
Carbs: First stored as glycogen. Then if glycogen stores are filled, can be converted fat directly. Also, displaces fat in the fuel mix. This can lead to fat being spared from oxidation and leads to obesity.
Lipids: Moves efficiently into the body's fat stores.

- During feeding (feasting), fat oxidation increases, excess carbs and proteins lead to increased fat stores, and excess fat is moved efficiently into fat stores.
- During fasting, eventually all macros are used for energy.
- During acute starvation, lean muscle tissue wastes away, gluconeogenesis is the main form of energy synthesis, and the metabolism severely slows down.