Zinc oxide is the metal zinc that has been oxidized. The chemical formula is ZnO, 1 zinc atom and 1 oxygen atom held together by an ionic bond. Zinc oxide does occur in nature as the mineral zincite, but it is quite rare and commercially unavailable.
I have done a few stool samples in my time and have always just stored them in the fridge, until the next day to take them into the docs. Good luck hun I hope they get it sorted.
Research shows that bacteria do not grow readily in human milk, and that it can be kept safely at room temperature for 4 to 6 hours or more. So you donât need to worry if you canât rush your milk to the refrigerator right after you express.