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by User23 1403 days ago
jononomo's claim is factually correct. It's been experimentally proven in metabolic ward studies that dietary protein is never stored as body fat. While hypothetically it appears that since there is a protein to glucose pathway and a glucose to lipid pathway that excess protein could conceivably be stored as body fat, what actually happens is the kidneys just eliminate the excess nitrogen. Again, that's not a theoretical result. It has been observed repeatedly in metabolic ward studies. For those who aren't aware, a metabolic ward study is run in what is effectively a prison. The study participants are physically deprived access to any food or beverage except that which the experimenters provide. Needless to say these studies are extremely expensive, since people expect to be well compensated for being imprisoned for weeks or even months.

Incidentally, when it comes to health, weight gain and weight loss are of relatively minor importance compared to body composition. Gaining weight in your musculoskeletal system is a good for survivability and quality of life! Denser muscles and bones are not a bad thing. It's excess body fat, in particular visceral body fat, that causes morbidity and mortality. If you get fat enough your body will start storing those lipids in your vital organs, and that's a recipe for inflammation, early cancer, and other kinds of death.

Edit: here’s a fun story about a normal guy trying a high protein diet: https://fivethirtyeight.com/features/the-rock-dwayne-johnson...

2 comments

Great comment! I agree with all of it.
Do you have a link to these studies?
I'm not your personal librarian. Go to your local university library, or if that fails try scholar.google.com. Be sure and search specifically for metabolic ward studies on protein intake and nutrient partitioning. I found this data for myself many years ago. Sadly I didn't save the references and unfortunately digging through research like this isn't as simple as searching for the latest movie show times. I wish I had, but if so I'd have already included them. Feel free to believe me or not.