Buying a test for someone else?
Learn how
UK's first direct-to-consumer blood testing service. 
We've delivered over 7.5 million test results. 
We've helped over 200,000 people take control of their health. Biomarker table
Vitamins
Vitamin B2
Learn more
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.
Special instructions
How to prepare for your test
Prepare for your Vitamin B1 (Thiamine) Blood Test by following these instructions. Do not eat or drink anything other than water for 12 hours prior to your test. If you take medication then you are allowed to take it as you would normally. Take your sample at least 24 hours after any vitamin or mineral supplements. Wrap your sample in foil immediately after it is taken.
Blood testing made easy
How it works
Your personalised, actionable health results are only a few clicks away. Order your test, take and post your sample, then view your results online with our doctors' comments.
Your results, simplified
Track, improve, and monitor your health over time
MyMedichecks is your personal online dashboard where you can view your results, access clear and simple explanations about individual health markers, monitor changes in your health, and securely store information about your medical history, lifestyle, and vital statistics.
FAQs
What is vitamin B2?
Vitamin B2 is in foods like almonds, whole grains, mushrooms, certain dairy products, eggs, brewer’s yeast, and some green vegetables.
What are the symptoms of vitamin B2 deficiency?
Although rare, vitamin B2 deficiency can occur. Symptoms include anaemia, fatigue, slowed metabolism, nerve damage, a swollen tongue, mouth sores and cracks, skin inflammation, sore throat, swelling of the mucous membranes, and mood changes.
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.