People with severe liver disease need lots of protein to stay healthy, but eating protein can make their brain symptoms worse — so doctors don’t know what to recommend.

When people with liver problems eat protein, their bodies break it down into ammonia, which can build up and harm the brain.

When the liver can't clean out ammonia properly, it builds up in the blood and messes with brain function, causing confusion or drowsiness.

Excessive protein intake overwhelms hepatic urea cycle capacity, leading to systemic ammonia accumulation and subsequent metabolic toxicity.

We need a smarter way to give liver patients enough protein to stay strong, without making their brain fog worse.

Some types of protein building blocks (amino acids) make more ammonia than others when broken down — especially in people with liver problems.