What is Protein Balance?

Protein Balance is the balance between protein synthesis and degradation. It also may be referred to as nitrogen balance.
When you’re in a NET + meaning you have synthesized more protein than you broke down, you are in what is known as an Anabolic state and you are building up molecules from smaller units.
If you are NET - meaning you have degraded more protein than you synthesized you are in a Catabolic state, which means you’ll break down molecules.
According to the International Society of Sports Nutrition, for building muscle mass and for maintaining muscle mass through a positive muscle protein balance, an overall daily protein intake in the range of 1.4-2.0 g protein/kg body weight/day (g/kg/d) is sufficient for most exercising individuals.
There is novel evidence that suggests higher protein intakes (greater than 3.0 g/kg/d) may have positive effects on body composition in resistance-trained individuals (i.e., promote loss of fat mass).
Key Terms:
Amino Acids - Molecules that are combined to form proteins.
Proteins - Large, complex molecules that play many critical roles in the body.
Protein Synthesis - The creation of new proteins.
Protein Degradation/Breakdown - a process that destroys proteins in cells to maintain protein homeostasis.
Catabolism - a metabolic process that breaks down large molecules into smaller ones, releasing energy in the process.
Anabolism - a biochemical process that involves the construction of complex molecules from smaller units.

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