Is 0.59 g/kg of egg protein per day enough to maintain nitrogen balance and body potassium in young men?

Nitrogen balance refers to whether your body is holding onto the protein it needs to repair tissues or losing more than it gains. When nitrogen balance turns negative, your body starts breaking down muscle to get the amino acids it needs. Potassium is a mineral that helps muscles and nerves work properly, and losing it can affect strength and recovery. The evidence we’ve reviewed suggests that consuming only 0.59 g/kg of egg protein daily doesn’t meet the body’s needs to prevent these losses.

This doesn’t mean protein at this level is harmful—it just appears insufficient for long-term balance. Egg protein is high quality and easily used by the body, but even with that advantage, the amount here seems too low. We don’t know if higher intakes would fully prevent these losses, because the evidence we’ve reviewed stops at this specific number.

What this means for someone trying to stay healthy: if you’re eating egg protein at this rate—about 41 grams per day for a 70 kg man—you might be slowly losing muscle and potassium without realizing it. You may not feel weak right away, but over weeks or months, your body could be working against itself.

We don’t yet know the exact threshold where protein becomes sufficient, but based on what we’ve seen so far, 0.59 g/kg may be too low to maintain your body’s balance.