Vitamin B6 - Forms

Forms

Seven forms of this vitamin are known:

  • Pyridoxine (PN), the form that is most commonly given as vitamin B6 supplement
  • Pyridoxine 5'-phosphate (PNP)
  • Pyridoxal (PL)
  • Pyridoxal 5'-phosphate (PLP), the metabolically active form (sold as 'P-5-P' vitamin supplement)
  • Pyridoxamine (PM)
  • Pyridoxamine 5'-phosphate (PMP)
  • 4-Pyridoxic acid (PA), the catabolite which is excreted in the urine

All forms except PA can be interconverted.

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