Pyridoxinecarboxylic acid, also known as pyridoxine-5-carboxylic acid or P5C, is a compound that plays a vital role in several biological processes. This compound is derived from pyridoxine, which is more commonly known as vitamin B6. Pyridoxinecarboxylic acid serves as a precursor in the synthesis of coenzymes involved in metabolism and neurotransmitter synthesis. It is commonly found in food sources like meat, fish, and fruits. Some synonyms for pyridoxinecarboxylic acid include pyridoxine-5-carboxylate, pyridoxine carboxylate, and 4-pyridoxic acid. These synonyms are interchangeably used to refer to this compound in scientific literature and discussions regarding its functions and benefits in the human body.