Medically reviewed by Aviv Joshua, MS, RDN Phenylalanine is an essential amino acid (building block of protein) that the body ...

“L-tyrosine is a precursor to dopamine, the neurotransmitter that aids in motivation, mood regulation, and pleasure,” says Best. Studies have suggested limited benefit in individuals with low dopamine ...

A rare disease in the US is one in 1,500, or fewer than 200,000 people, and an ultra-rare disease is one in 50,000 or fewer than than 6,000 people.

The intake of aspartame was studied in 51 adults 23 of whom were carriers for phenylketonuria (PKU). The study was divided into a loading test followed by chronic intake for a period of 12 weeks.

PKU is a rare genetic disease that manifests ... At the moment the main treatment strategy is to restrict phe in the diet, a lifetime commitment that often requires nutritional supplements to ...

PKU is a genetic disease that manifests at birth ... The main treatment strategy is to restrict phe in the diet, a lifetime commitment that requires nutritional supplements to prevent deficiencies ...

Once a child was diagnosed, a strict low-phenylalanine diet could prevent further damage, but Warner had no easy way to measure phenylalanine levels in his PKU patients’ blood to monitor the diet’s ...