Comment The dirty secret of how the protein guidelines are (Score 1) 197
The history of protein guidelines is a story of institutional convenience overriding biological reality.
It started deeply flawed (1970sâ"1980s)
1. Global standards were built on short-term nitrogen balance studies. They assumed that if a subject stopped excreting nitrogen, their body was stable. In reality, at low protein intakes (0.57 g/kg), the human body enters a survival shutdown. It ceases skin cell renewal, down-regulates muscle synthesis, and wastes lean tissue to make do with insufficient protein.
Then they Ignored the warnings (1980sâ"2000s)
2. Dr. Nevin Scrimshaw ran long-term studies proving that men fed these "safe" baselines suffered progressive lean tissue loss and elevated liver enzymes. The committees knew this, but ignored the data. Acknowledging it meant admitting that their mathematical framework for the Estimated Average Requirement (EAR) was fundamentally broken.
The sketchy committees (2003â"2005)
3. When updating these guidelines, committees settled on a median baseline of **0.66 g/kg**. They openly acknowledged in the fine print that this "apparent equilibrium" did not mean optimal health. However, raising the baseline would have triggered global chaos: international aid food supplies would instantly become legally inadequate, and national agricultural budgets would skyrocket. They applied a generic +25% buffer to reach the famous **0.8 g/kg** RDA to mask an insufficient baseline.
4. The truth comes out (2007â"Present)
4. In 2007, researchers using advanced isotopic tracers bypassed the old nitrogen math entirely. They proved that the true baseline requirement is **0.93 g/kg** and the actual safe intake is **1.2 g/kg**. The official guidelines remain an open secretâ"a bureaucratic fiction frozen in place to protect policy, not human health.
With 1.2 g/kg you see that most Americans are below the true requirement. With a mean of 0.98 g/kg it makes sense why so many Americans need to eat more meat.