Retinol-binding Protein (RbP) Serum Test

What is the purpose of this test?

The Retinol-binding Protein (RbP) Serum Test measures the level of retinol-binding protein (RbP) in your blood. RbP is a protein that carries vitamin A (retinol) throughout your body, which is essential for vision, immune function, and skin health. By testing for RbP, this test helps doctors evaluate your body’s ability to transport and utilize vitamin A. Abnormal levels of RbP can indicate nutritional deficiencies, liver disease, or kidney dysfunction, as these organs play a key role in producing and managing this protein.

In addition to assessing vitamin A levels, the RbP Serum Test can provide insights into overall nutritional health. Low levels of RbP may suggest poor nutritional status, particularly in cases where individuals are not getting enough vitamin A or have difficulty absorbing it. High levels can sometimes signal kidney problems, as RbP is often excreted by the kidneys. Monitoring these levels can help doctors identify and address issues related to vitamin A metabolism and organ function before they lead to more serious health concerns.

Who should get this test?

The Retinol-binding Protein (RbP) Serum Test may benefit:

• Individuals with poor nutrition or limited access to a balanced diet.
• People with liver or kidney disorders who need to monitor protein levels.
• Individuals showing signs of vitamin A deficiency, such as dry eyes, poor vision, or skin problems.
• Patients with conditions affecting vitamin absorption, such as celiac disease or Crohn’s disease.
• People with unexplained weight loss, fatigue, or other signs of malnutrition.
• Individuals undergoing treatment for kidney or liver disease.

When should I order the Retinol-binding Protein (RbP) Serum Test?

Individuals may consider ordering this test if they have symptoms or exposure concerns related to vitamin A or organ function. Symptoms to consider:

• Dry or irritated eyes, or difficulty seeing in low light.
• Skin problems like dryness, rough texture, or acne.
• Unexplained weight loss, fatigue, or weakness.
• Swelling in the legs, ankles, or feet (potential sign of kidney issues).
• Persistent digestive issues or signs of poor nutrient absorption, like bloating or diarrhea.

If you have these symptoms or suspect a vitamin A deficiency or kidney/liver problem, the Retinol-binding Protein (RbP) Serum Test can provide important information to help guide you and your doctor in managing your health and ensuring proper nutrition.