Vitamin D Test

About This Test

This test gauges the Vitamin D level in your bloodstream. When your skin is exposed to sunlight, it can naturally produce Vitamin D, and many foods are also fortified with it. Your body stores an inactive Vitamin D form in fat cells until required. The liver and kidneys convert this to the active form, 25 hydroxyvitamin D, necessary for bodily functions. Our blood test measures this active form, serving as an indicator for your Vitamin D levels. Deviations in Vitamin D levels could suggest bone issues, nutritional disorders, or metabolic problems.

Signs & Symptoms

People with abnormal Vitamin D levels may not experience signs or symptoms. If symptoms do occur, they may resemble other health conditions. You may consider a Vitamin D test if you are experiencing the following symptoms:

Vitamin D deficiency (low levels of Vitamin D) symptoms include:

• Bone pain
• Fatigue
• Depression or other mood changes
• Confusion
• Muscle weakness, muscle aches, or muscle cramps
• Hair loss

Vitamin D toxicity (high levels of Vitamin D) symptoms include:

• Nausea
• Weakness
• Vomiting
• Constipation
• Poor appetite
• Abdominal pain
• Weight loss

Who Should Have This Test

The Vitamin D test is for anyone who wants to monitor their Vitamin D levels. You must be 18 years old or older to purchase.

How This Test is Performed

Sample collection will involve obtaining a blood sample through venipuncture, where a needle is used to draw blood from a vein.

Preparing for Your Test