Tag: Critical value

According to the National Institutes of Health, nearly 5% of the U.S. population is at risk of vitamin D deficiency, which is defined as serum 25(OH)D levels below 12 ng/mL (30 nmol/L). Knowing what is a critical value for vitamin D is essential for interpreting blood test results and making informed health decisions.

According to Mayo Clinic, a normal blood sodium level is between 135 and 145 millimoles per liter (mmol/L). A critical number for sodium exists at both the low and high extremes of this range, representing an immediate threat to life that requires prompt medical attention.