ALB and obstructive sleep apnea syndrome: While most of the OSA activities of whole saliva are located in the supernatant fluids, saliva lost most of its OSA upon dialysis in tubings with a cutoff point of 6 kD, (Figure 6) indicating that the main antioxidant of saliva are associated as already suggested with low molecular-weight agents mainly, uric acid, ascorbate, reduced glutathione and albumin [1], [7]–[10].