Products are described for treating epithelial tissues of the human or animal body including liquid compositions containing whole blood, or parts of blood including blood plasma, blood serum, blood platelets and growth factors derivable from blood. Other compositions disclosed include solid reservoirs of collagen or amniotic membrane into which whole blood or parts of blood have been absorbed. Methods of treatment using these compositions are described, in particular for treatment of ophthalmic disorders such as dry-eye and oral disorders such as dry mouth. A range of devices (1, 11, 31, 41, 51, 61, 71, 81, 91, 101) are described for sampling, mixing, storing and/or applying blood and compositions containing blood and parts of blood.
