Lab test

Vitamin B3 Niacin Testing - Deficiency Test

This blood test is used to evaluate vitamin B3 (niacin) levels and can help detect a deficiency.

Typical price

From $49

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

This blood test is used to evaluate vitamin B3 (niacin) levels and can help detect a deficiency. Like other B vitamins, niacin plays a role in converting carbohydrates into glucose and in a range of metabolic reactions. The test may be ordered when a provider suspects a nutritional deficiency or wants to assess vitamin status in someone with poor diet, digestive problems, or symptoms that could relate to low niacin. Results are interpreted alongside other vitamin tests and clinical findings rather than on their own.

• Vitamin B3 (niacin) Measures the level of this B vitamin in the blood.

• People with poor or restricted diets
• Individuals with digestive conditions affecting absorption
• People with symptoms that may relate to a B vitamin deficiency
• Those being assessed with a broader nutritional panel

• Fasting may be requested before the draw.
• Tell the collector about vitamin supplements or medicines you take.
• Follow any instructions provided for your specific panel.

A low niacin level may suggest deficiency, which can relate to inadequate diet or absorption problems, while high levels are usually related to supplements. Because niacin deficiency symptoms overlap with other conditions, results are interpreted with your diet, history, and other vitamin tests. Discuss results with a healthcare provider.

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