Vitamin B3 (Niacin) Blood Test, from our experts to you.
Dr Sam Rodgers MBBS, MRCGP

Chief Medical Officer

Expert Image

How many
B vitamins are there?

Altogether, there are eight B vitamins, each with its purpose and role within the body. The B vitamins are all water-soluble and crucial for cell metabolism, normal functioning of the central nervous system, and the formation of red blood cells. All the B vitamins we need should be available through our diet. The B vitamins help to convert food into fuel and metabolise fats and proteins.

What is
vitamin B3?

Vitamin B3 is in foods such as eggs, peanuts, fresh fruit and vegetables, red meat, and fortified cereals.

What are the symptoms
of vitamin B3 deficiency?

Although extremely rare, vitamin B3 deficiency can occur. Symptoms include fatigue, vomiting, disorientation, memory loss, and mouth swelling. Strict vegetarians and vegans may be at risk of vitamin B3 deficiency.

What's Included?

Select profile for more information

Vitamin B3 The B vitamins are a group of 8 all water-soluble vitamins, all crucial for cell metabolism, converting food into energy, the normal functioning of the central nervous system and the formation of red blood cells.

How to prepare
for your test

Special Instructions

Prepare for your Vitamin B3 (Niacin) Blood Test by following these instructions. Do not eat for 12 hours prior to your test. Drink plenty of water, if you take medication then you are allowed to take it as you would normally. You should take this test before you take any medication or vitamin/mineral supplements.