The Vitamin D3 Test or Vitamin D 25-OH Test measures the levels of 25-hydroxyvitamin D in the blood, which is the primary circulating form of vitamin D in the body. This test is the most accurate way to assess a person's vitamin D status.
Vitamin D is essential for bone health, immune function, and overall well-being. The test helps determine whether you have sufficient, insufficient, or deficient levels of vitamin D. Low levels can lead to issues like bone weakness, osteoporosis, and increased risk of infections, while high levels can be harmful as well.
It is commonly recommended for individuals at risk of vitamin D deficiency, such as those with limited sun exposure, older adults, or people with certain health conditions.