All three compounds are efficiently converted to the biologically active form of vitamin B6, pyridoxal phosphate.

In the intestine, PN is converted to pyridoxine phosphate (PNP), PL is converted to pyridoxal phosphate (PLP), and PNP is often converted to PLP, while PM remains the same, and composes about 15% of the vitamers in the blood.

Pyridoxal phosphate (PLP) is the active form and is a cofactor in many reactions of amino acid metabolism, including transamination, deamination, and decarboxylation.

Pyridoxal phosphate (PLP) is the active form and is also a cofactor in many reactions of amino acid metabolism, including transamination, deamination, and decarboxylation.

Do not take more than 100 mg of vitamin B6 daily on a long-term basis unless it is in the pyridoxal phosphate form and only after consulting with your doctor.