The main component of interstitial fluid is water.
Interstitial fluid, also known as tissue fluid, is the fluid that surrounds cells in the body. According to the provided reference, it consists of a water solvent containing amino acids, sugars, fatty acids, coenzymes, hormones, neurotransmitters, salts, as well as waste products from the cells. The composition is dependent upon the exchanges between tissue cells and the blood. While it contains various solutes, the primary component providing the solvent is water.
