Is 5.67 red blood count high or low?

The provided value of 5.67 does not specify a unit of measurement, so it is not possible to determine whether it is high or low for red blood cell count without additional information. Red blood cell count is typically measured in millions of cells per microliter (M/µL) or in thousands of cells per cubic millimeter (K/mm³). Normal ranges may vary slightly based on age, sex, and laboratory reference values, but generally, the typical range for red blood cell count is approximately 4.5-5.9 M/µL (4.5-5.9 million cells per microliter) for men and 4.1-5.1 M/µL (4.1-5.1 million cells per microliter) for women. To determine if 5.67 is high or low, it would be necessary to know the unit of measurement and compare it to the appropriate reference ranges.