Vitamin B7 Blood Test

What is the purpose of this test?

The Vitamin B7 Blood Test measures the level of biotin—also known as vitamin B7—in your bloodstream. Biotin is a B-complex vitamin that plays a key role in metabolism, helping your body convert food into energy. It also supports healthy skin, hair, nails, and nerves. Since your body doesn’t store biotin for long periods, regular intake through food or supplements is necessary to prevent deficiency. A blood test is the most reliable way to check if your biotin levels are within a healthy range.

Low levels of vitamin B7 can lead to various symptoms like thinning hair, brittle nails, skin rashes, or even neurological issues such as depression or numbness. This test is useful for identifying a biotin deficiency, especially in people with poor dietary habits, malabsorption issues, or those taking certain medications like anticonvulsants or antibiotics. Monitoring your biotin level through this test can help you and your healthcare provider determine whether you need dietary changes or supplements to support your health.

Who should get this test?

The Vitamin B7 Blood Test may benefit individuals who:

• Have symptoms of biotin deficiency, such as hair loss or brittle nails
• Are pregnant or breastfeeding (biotin needs increase during these times)
• Have digestive disorders that may affect nutrient absorption (e.g., Crohn’s disease)
• Take medications known to deplete vitamin B7 (such as anticonvulsants or isotretinoin)
• Follow restrictive diets low in biotin-rich foods
• Use biotin supplements and want to monitor their levels
• Are being evaluated for the cause of skin rashes or neurological symptoms

When should I order the Vitamin B7 Blood Test?

Individuals may consider ordering this test if they have symptoms related tovitamin B7 (biotin) deficiency.

Symptoms to consider:

• Thinning or brittle hair
• Red, scaly rash around the eyes, nose, or mouth
• Unexplained fatigue or low energy levels
• Muscle pain or cramping
• Numbness or tingling in the hands or feet
• Weak or brittle nails

If you are experiencing these symptoms or suspect a vitamin B7 deficiency, the Vitamin B7 Blood Test can provide useful information to help you and your doctor manage your health.