VITAMIN B6/PYRIDOXAL - 5 - PHOSPHATE
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VITAMIN B6/PYRIDOXAL - 5 - PHOSPHATE

Vitamin B6 (Pyridoxal-5-Phosphate) Blood Test

The Ibn Sina Trust
Praava Health
Dr Lal PathLabs
Omnicare Diagnostic Limited
Thyrocare Bangladesh Ltd
Brac Healthcare
Popular Diagnostic Centre Ltd
JG Healthcare
Sample Type
blood
Fasting Required
Yes
Description

Description: This test measures the levels of pyridoxal-5-phosphate (PLP), the active form of vitamin B6, in the blood. It helps assess vitamin B6 deficiency or excess, which can impact nerve function, metabolism, and overall health.

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How our test process works!

Step 1

Sample Collection

Vaccinated Phlebotomists collects from syringe in the barcoded vials

Step 2

Sample Storage

Only vaccinated phelbos are assigned orders

Step 3

High Tech Facility

Lab ingests the sample into processing machines which are 100% automated

Step 4

Accurate Digital Reports

The reports are generated by the processing machines and clinically correlated by doctors

Overview

Overview

The Vitamin B6 / Pyridoxal-5-Phosphate (PLP) test measures the level of active vitamin B6 in the blood. Vitamin B6 is essential for metabolism, neurotransmitter function, red blood cell production, and immune function. The test is often used to assess deficiency or toxicity of vitamin B6.

 

Risk Assessment

Risk Assessment

Who Should Get Tested?

  • People with symptoms of vitamin B6 deficiency (e.g., irritability, depression, confusion, anemia, weakened immune system).
  • Those with symptoms of excess vitamin B6 (e.g., nerve damage, tingling/numbness in the extremities).
  • Individuals with malabsorption disorders (e.g., celiac disease, Crohn’s disease).
  • Patients on medications that interfere with vitamin B6 metabolism (e.g., isoniazid, hydralazine).
  • People with kidney disease or liver disease, as these conditions can affect vitamin B6 levels.

 

Normal Range

Normal Range

  • Plasma/Serum PLP: 20–200 nmol/L (5–50 ng/mL)
    • Optimal levels may vary slightly by laboratory.

 

Interpretation

Interpretation of Results

Vitamin B6 Level (PLP) Interpretation
Below Normal (< 5 ng/mL or < 20 nmol/L) Possible deficiency; may cause neurological and immune issues. Common in alcoholics, pregnant women, and those with malabsorption disorders.
Normal (5–50 ng/mL or 20–200 nmol/L) Optimal range for health.
Above Normal (> 50 ng/mL or > 200 nmol/L) Possible toxicity; may cause nerve damage, numbness, and coordination problems. Usually due to excessive supplementation.

 

Sample Type

Sample Type

  • Blood Sample (Plasma or Serum)
  • Fasting Required? Usually not required, but some labs may recommend it.

Frequently Asked Question