Assessment of Protein Quality

Metabolic Studies

The most accurate assessment of protein quality of foods for humans is through clinical or metabolic studies that measure nitrogen balance. A fixed amount of protein is fed to a group of individuals until a steady state is reached. At that point, excreta are collected and analyzed for their nitrogen content, and integumental nitrogen losses are generally estimated at approximately 5mgNkg—1 to calculate NB as follows: NB = iN — UN — FN — IntegN (See abbreviations in Table 1). Measurements are repeated with different amounts of food protein and the relationship between nitrogen intake and nitrogen balance is evaluated (Figure 1). The slope of the line before NB reaches a plateau and the amount of dietary protein needed to attain ''0'' nitrogen balance are indicators of protein quality: The steeper the slope and the lower the amount of dietary protein to achieve balance, the higher the quality of the protein being tested.

33 "to

30 Day Low Carb Diet Ketosis Plan

30 Day Low Carb Diet Ketosis Plan

An Open Letter To Anyone Who Wants To Lose Up To 20 Pounds In 30 Days The 'Low Carb' Way. 30-Day Low Carb Diet 'Ketosis Plan' has already helped scores of people lose their excess pounds and inches faster and easier than they ever thought possible. Why not find out what 30-Day Low Carb Diet 'Ketosis Plan' can do for you by trying it out for yourself.

Get My Free Ebook


Post a comment