$54.00
Priced per marker, with baseline labs included. You’ll see your total before you pay.
Brain & nervous system
Vitamin B2 (riboflavin) test
Cofactor for many enzymes and energy production.
At a glance
In about 5 days
Most results are ready in about 5 days. Some specialty markers can take up to 21 days.
Check before your draw
This marker has no preparation tag, but it can still need preparation. Contact us before your draw if you’re not sure.
Walk in at Quest
Your lab order arrives by email. Most Quest locations take walk-ins, so bring it with a photo ID.
What it measures
Looks at riboflavin, also called vitamin B2. It helps your body turn food into energy and keeps your skin and eyes healthy.
Why it matters for women
Your body needs more riboflavin during pregnancy and breastfeeding, and low levels can be more common if you eat little dairy, eggs or meat. Riboflavin also helps your body put other B vitamins, like B6, to work.
You might check it if…
- you eat little or no dairy, eggs or meat
- you get cracked lips or sores at the corners of your mouth
- you’re pregnant or breastfeeding and eat a limited diet
- you drink alcohol heavily
What your result may mean
High Vitamin B2 (riboflavin): what it may mean
High riboflavin may mean you take vitamin B2 on its own or in a B-complex, and it may not be toxic. Extra riboflavin can leave the body in urine, which can turn it bright yellow, and that may be harmless. Some people take riboflavin for migraines, so a high value may simply match that routine. A dose taken shortly before the test can raise the reading. There may be no symptoms at all from a high value.
Low Vitamin B2 (riboflavin): what it may mean
Low riboflavin may occur with heavy alcohol use, malnutrition or certain medicines. It can also happen if you eat little dairy, eggs or meat, and needs can rise during pregnancy and breastfeeding. Some people may notice cracked skin at the corners of the mouth, a sore throat, a swollen tongue, itchy red eyes or skin rashes. Riboflavin can help your body put other B vitamins, like B6, to work, so a low level can come with shortfalls in those too. Testing other B vitamins can give a fuller view.
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These notes provide context and do not diagnose a condition. Not yet available in NY, NJ, RI, HI, ND, SD or WV.