Hyfresh UD 0.3% Ophthalmic Gel Unit Dose 0.45ml 20 PackHyfresh Gel 3 mg mL Sodium Hyaluronate Eye Gel 0. 45 mL solution is hypotonic and 1 ml solution of which contains sodium hyaluronate 3. 0 mg, sodium citrate, potassium chloride, calcium chloride, magnesium chloride, sodium chloride, citric acid or sodium hydroxide (to adjust pH) and water for injection. Hyfresh Gel is well tolerated due to its unique composition and gives long lasting relief with maximum comfort.