ALB and asthma: In the light of literature and our data, one might suggest that not bilirubin but PT may cause a decrease in antioxidant capacity, and may be related risk of developing asthma Human serum albumin, which is a multifunctional, non-glycosylated, negatively charged transport protein in human blood plasma serving antioxidant and enzymatic functions, is the most important antioxidant in an individual who is exposed to oxidative stress[18].