What Is the Osmolarity of Normal Human Blood?

Common solutes in human blood plasma include electrolytes, sugars and amino acids. The greater the amount of solutes in the blood, the higher the osmolarity. A high osmolarity corresponds with a lack of water relative to the amount of solute in the blood, resulting in dehydration.

Both osmolarity and osmolality measure the concentration of solutes within a water solution. In osmolarity, the concentration is measured in moles per liter of solution. In osmolality, solute concentration is measured in moles per liter of water.