Pyridoxal-5'-phosphate (PLP) is the biologically active form and serves as a cofactor for more than 140 different enzyme reactions, representing 4% of all known catalytic activity. Deficiencies can occur in people with mutations of pyridoxal kinase (PLK) or pyridoxine 5' phosphate oxidase (PNPOx), as well as in individuals who are pregnant ...

Pyridoxal 5'Phosphate (PLP), the most clinically significant coenzyme form of vitamin B 6, is the form most commonly measured in plasma. 1-3

5-phosphate (PLP) are indicative of adequate nutrition. The following are interpretative guidelines based upon PLP and PA results: If PLP is >100 mcg/L and PA is < or =30 mcg/L:

Pyridoxal 5'-phosphate measured in a specimen collected following an 8 hour or overnight fast accurately indicates vitamin B 6 nutritional status. Non-fasting specimen concentration reflects recent vitamin intake. This test was developed and its performance characteristics determined by ARUP Laboratories.

Pyridoxal-5'-phosphate (PLP) is the biologically active form and serves as a cofactor for more than 140 different enzyme reactions, representing 4% of all known catalytic activity. Deficiencies can occur in people with mutations of pyridoxal kinase (PLK) or pyridoxine 5' phosphate oxidase (PNPOx), as well as in individuals who are pregnant ...

Pyridoxal-5'-phosphate (PLP) is the biologically active form and serves as a cofactor for more than 140 different enzyme reactions, representing 4% of all known catalytic activity. Deficiencies can occur in people with mutations of pyridoxal kinase or pyridoxine 5'-phosphate oxidase, as well as in individuals who are pregnant, have kidney ...

Test Usage Determining vitamin B6 status, including in persons who present with progressive nerve compression disorders, such as carpal tunnel and tarsal tunnel syndromes; determining the overall success of a vitamin B6 supplementation program; and diagnosis and evaluation of hypophosphatasia.

Vitamin B 6, Plasma - Test is used to determine vitamin B6 deficiency or overdosage, for monitoring treatment, and to evaluate wellness and health. Overnight fasting is required. Chromatography/Mass Spectrometry. This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics.

Interpretation:Levels for fasting individuals falling in the range of 3 to 30 mcg/L for pyridoxic acid (PA) and 5 to 50 mcg/L for pyridoxal 5-phosphate (PLP) are indicative of adequate nutrition.

Interpretation:Levels for fasting individuals falling in the range of 3 to 30 mcg/L for pyridoxic acid (PA) and 5 to 50 mcg/L for pyridoxal 5-phosphate (PLP) are indicative of adequate nutrition. The following are interpretative guidelines based upon PLP and PA results:If PLP is >100mcg/L; or -If PLP is >100 mcg/L and PA is < or =30, the ...