Is vitamin D2 less than 2.2 ng/mL normal?

Generally, a vitamin D₂ level below 2.2 ng/mL is considered abnormally low, suggesting a potential deficiency that may require adjustment and supplementation based on individual circumstances. If concerned, it is advisable to consult a healthcare provider promptly. Detailed analysis is as follows:

In common clinical reference standards, the normal range for vitamin D₂ is typically above 10 ng/mL. A level below 2.2 ng/mL is far below this threshold and indicates a clear deficiency. Vitamin D₂ plays an important role in calcium and phosphorus metabolism and is crucial for bone health. Long-term deficiency may lead to osteoporosis and bone pain; in children, it may impair growth and development, while adults may experience symptoms such as fatigue and muscle aches.

However, a single test result alone cannot provide a definitive diagnosis and should be interpreted in conjunction with the testing method and individual health status. Low levels may result from limited sun exposure, inadequate dietary intake of vitamin D-rich foods, or malabsorption issues (such as gastrointestinal disorders). Additionally, testing errors could also contribute to abnormal results; in such cases, retesting is recommended to confirm findings before initiating targeted interventions.

Upon identifying a low vitamin D₂ level, individuals should seek medical follow-up testing to determine the extent of deficiency. Daily measures include increasing outdoor activities and sun exposure, consuming more vitamin D-rich foods such as fatty fish and egg yolks, and, when necessary, taking supplements under professional guidance, along with regular monitoring of vitamin D levels.