Pyridoxal-5'-phosphate, or P5P, is the active coenzyme form of vitamin B-6. "Active" means it can be used directly in B6-dependent enzyme functions, no conversion necessary. P5P is required for many important tasks within the body, including muscle growth and repair, neurotransmitter functions and energy metabolism.
Functions of P5P - A Closer Look
Pyridoxal-5'-phosphate plays a role in many fundamental processes, including amino acid metabolism, heme biosynthesis, neurotransmitter biosynthesis, collagen formation and glucocorticoid action. It helps maintain sodium and potassium levels, which in turn supports the nervous, cardiovascular and musculoskeletal systems, and helps the body build, break down and change amino acids. Importantly, P5P also facilitates the production of antibodies and red blood cells.
The recommended dose of P5P varies from person to person. Please speak with a medical professional prior to taking any health supplement - including P5P.
Sources
Livestrong.com, "What Are The Benefits of P5P?"
Seeking Health, here.