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Vitamin B5 (Pantothenic Acid) - Serum Concentration

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of vitamin B5 (also called pantothenic acid) in your blood. Vitamin B5 is an essential nutrient that plays a key role in energy production and maintaining healthy nerves and skin.

Quick summary

["Vitamin B5 supports energy metabolism and nerve function."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
81069-7
Short code
Vit B5 24h Measured
Synonyms
Vit B5 24h Measured
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
measured
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Might This Test Be Ordered?

Your healthcare provider may recommend this test if you have symptoms like fatigue, nerve pain, or skin issues that could be linked to low vitamin B5 levels. It may also be checked in cases of suspected vitamin deficiencies, certain metabolic disorders, or during monitoring of long-term vitamin supplementation.

What Does the Test Involve?

A blood sample is drawn from a vein, usually in your arm. The sample is then sent to a lab for analysis to measure the concentration of vitamin B5 in your serum.

What to Expect Before or After the Test

No special preparation is typically needed. You may feel slight discomfort during the blood draw, but it usually resolves quickly. If you’re on blood thinners or have a history of bleeding issues, let your provider know before the test.

What Are Common Causes of Low or High Levels?

Low vitamin B5 levels can result from poor diet, certain medications, or malabsorption issues. Rarely, genetic disorders or excessive alcohol use may also contribute. High levels are less common but can occur with over-supplementation or specific medical conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Vitamin B5 Level

Frequently asked questions

How often is this test ordered in routine care?
This test is not routinely included in standard blood panels. It’s usually ordered when symptoms or clinical concerns suggest a vitamin deficiency or metabolic issue.
What are typical reference ranges for this test?
Reference ranges for vitamin B5 can vary by lab and may not be widely standardized. Your results will be compared to your lab’s specific guidelines.
Can vitamin B5 levels change with diet or supplements?
Yes, diet plays a major role in vitamin B5 levels. Foods like whole grains, eggs, and organ meats contain vitamin B5. If you’re considering supplements, discuss them with your healthcare provider to avoid excess.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy