What is the normal range for vitamin K test?

The normal range for vitamin K levels may vary depending on the specific laboratory conducting the test. However, in general, a normal range for vitamin K1 levels in adults can be around 0.1 to 2.5 nanograms per milliliter (ng/mL) or 0.35 to 8.7 nanomoles per liter (nmol/L). It's important to note that reference ranges may differ, and the interpretation of vitamin K test results should be done in consultation with a healthcare professional who can consider individual factors and medical history. The healthcare provider can provide specific guidance based on the test results and determine if any intervention or treatment is necessary to address vitamin K status.