Description General description Pyridoxal-methyl-d3, an isotope-labeled analog of pyridoxal, is a form of vitamin B6. Natural source of pyridoxal is green plants, and its deficiency potentially causes epilepsy and seizures in humans. Application Pyridoxal-(methyl-d3) or vitamin B6-(methyl-d3) can be used as an internal analytical standard to study dietary intake, bioavailability, identification and concentration of pyridoxal within the complex biological samples. Packaging This product may be available from bulk stock and can be packaged on demand. For information on pricing, availability and packaging, please contact Stable Isotopes Customer Service.