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Vitamin B3 LIS Code: Vitamin B3

Assess vitamin B3 levels for metabolic and skin health. Reliable private blood testing.

£94 Blood sample Results in 15 days

Before your test

Any time of dayBook whichever slot suits you
Usually no fastingAny preparation this test needs is listed in your booking email
About 5 minutesA quick sample taken from your arm
Results onlineIn your secure online account, with the lab's reference ranges
Where you can test: SloughVictoriaNeasdenHome visit
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UKAS ISO 15189accredited laboratory
GMC-registereddoctors on hand
No GP referralbook directly
£94
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Order an at-home kit
⏱ Results in 15 days · LIS: Vitamin B3
ℹ️ TAT begins when your sample is received at our lab.
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Phlebotomy Fee: £25
A one-off £25 phlebotomy fee applies per visit — this covers your blood draw regardless of how many tests you book in the same appointment.

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About this test

What is Vitamin B3 (Niacin)

Vitamin B3, also known as niacin or nicotinic acid, is one of the eight essential B vitamins. It plays a critical role in maintaining overall health and supporting several physiological functions.

Key Functions of Vitamin B3

Energy Metabolism: Supports the breakdown of carbohydrates, fats, and proteins to generate energy.

DNA Repair: Assists in repairing damaged DNA and preserving genetic stability.

Skin Health: Promotes cell growth and helps in the repair of damaged skin.

Cholesterol Regulation: Helps reduce LDL (bad) cholesterol and increase HDL (good) cholesterol levels.

Brain Function: Involved in the production of neurotransmitters necessary for proper brain activity.

Sources of Vitamin B3

Dietary sources include meat, fish, poultry, peanuts, mushrooms, and whole grains. Niacin can also be synthesized in the body from tryptophan, an amino acid found in protein-rich foods such as turkey, chicken, and soybeans.

Pre-Test Instructions

Avoid alcohol consumption for at least 24 hours before a Vitamin B3 test, as it can interfere with the absorption and metabolism of niacin.

Our Professional Services Our diagnostic testing is carried out by Medical Diagnosis, a UKAS ISO 15189 accredited laboratory, ensuring all results meet the highest UK standards of quality and accuracy. Clinical consultations and treatments, including Testosterone Replacement Therapy (TRT) and Weight Management programmes, are delivered through Medical Diagnosis Victoria, which is registered with the Care Quality Commission (CQC). All clinical services are provided by GMC-registered doctors with extensive experience, following thorough medical assessment in line with UK regulatory standards.
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