vitamin D
A Vitamin D test is a blood test used to measure the level of vitamin D in your body, primarily to assess bone health, immune function, and nutritional status. It helps detect deficiency, insufficiency, or toxicity.
Name of the Test:
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The most common and accurate test is:
25-hydroxyvitamin D test (also written as 25(OH)D)
Why It’s Done:
To evaluate:
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Vitamin D deficiency or insufficiency
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Causes of bone pain or weakness
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Risk of osteoporosis
-
Conditions like rickets, osteomalacia, or calcium imbalance
-
Effectiveness of vitamin D supplements
Vitamin D Blood Levels:
| Level (ng/mL) | Interpretation |
|---|---|
| < 20 | Deficient |
| 20–29 | Insufficient |
| 30–50 | Optimal / Sufficient |
| 50–100 | High but not toxic |
| > 100–150+ | Possibly toxic (hypervitaminosis D) |
What the Test Measures:
-
Total 25(OH)D in the blood (includes both D2 and D3 forms)
-
It does not measure active vitamin D (1,25(OH)₂D) unless specifically ordered in rare cases
Who Should Get Tested?
-
People with symptoms of vitamin D deficiency (fatigue, bone pain, frequent infections)
-
Those with limited sun exposure
-
People with darker skin (which produces less vitamin D from sunlight)
-
Older adults, as their skin’s ability to make vitamin D decreases
-
Patients with osteoporosis, chronic kidney disease, or malabsorption disorders
How the Test Works:
-
A blood sample is taken (no fasting typically required)
-
Results are usually available within 24–48 hours
About The Package
A Vitamin D test is a blood test used to measure the level of vitamin D in your body, primarily to assess bone health, immune function, and nutritional status. It helps detect deficiency, insufficiency, or toxicity.
Name of the Test:
-
The most common and accurate test is:
25-hydroxyvitamin D test (also written as 25(OH)D)
Why It’s Done:
To evaluate:
-
Vitamin D deficiency or insufficiency
-
Causes of bone pain or weakness
-
Risk of osteoporosis
-
Conditions like rickets, osteomalacia, or calcium imbalance
-
Effectiveness of vitamin D supplements
Vitamin D Blood Levels:
| Level (ng/mL) | Interpretation |
|---|---|
| < 20 | Deficient |
| 20–29 | Insufficient |
| 30–50 | Optimal / Sufficient |
| 50–100 | High but not toxic |
| > 100–150+ | Possibly toxic (hypervitaminosis D) |
What the Test Measures:
-
Total 25(OH)D in the blood (includes both D2 and D3 forms)
-
It does not measure active vitamin D (1,25(OH)₂D) unless specifically ordered in rare cases
Who Should Get Tested?
-
People with symptoms of vitamin D deficiency (fatigue, bone pain, frequent infections)
-
Those with limited sun exposure
-
People with darker skin (which produces less vitamin D from sunlight)
-
Older adults, as their skin’s ability to make vitamin D decreases
-
Patients with osteoporosis, chronic kidney disease, or malabsorption disorders
How the Test Works:
-
A blood sample is taken (no fasting typically required)
-
Results are usually available within 24–48 hours
Inclusions & Exclusions
Inclusions
1. 25-Hydroxyvitamin D (25(OH)D)
-
This is the main and most accurate marker of vitamin D levels in the body.
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It includes:
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Vitamin D2 (Ergocalciferol) – from plant sources and supplements
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Vitamin D3 (Cholecalciferol) – from sun exposure, animal sources, and supplements
-
-
The total 25(OH)D level reflects your body’s vitamin D stores.
Optional Inclusions (in some extended panels or by special request):
While not typically part of a basic test, some advanced versions may also include:
Exclusions
| Excluded Test | What It’s For |
|---|
| Calcium (Serum Calcium) | Assesses bone health and vitamin D’s effect on calcium absorption |
| Phosphorus | Important for bone strength and works alongside calcium and vitamin D |
| Magnesium | Essential for vitamin D metabolism and bone health |
| Parathyroid Hormone (PTH) | Regulates calcium and vitamin D; helps detect parathyroid disorders |
| 1,25-Dihydroxyvitamin D (Active form) | Measures the active form of vitamin D; used in kidney or hormonal disorders |
| Vitamin D2 and D3 Breakdown | Distinguishes whether the vitamin D is from food/supplements (D2) or sunlight (D3) |
| Bone Density Test (DEXA Scan) | Assesses actual bone loss or osteoporosis—not part of any blood test |
| Liver and Kidney Function Tests | Organs involved in vitamin D metabolism; not included unless part of a broader panel |
About The Treatment
A Health Check-Up is a preventive medical examination designed to assess your overall health status and detect early signs of diseases or risk factors. These check-ups typically include a series of physical examinations, laboratory tests, and diagnostic screenings tailored to age, gender, medical history, and lifestyle.
Routine health check-ups are essential for early detection of conditions such as diabetes, heart disease, hypertension, and cancer. They help doctors monitor critical indicators like blood pressure, cholesterol levels, organ function, and more. Depending on the package or provider, a health check-up can range from basic blood tests to advanced imaging like CT scans or full-body MRIs.