The most frequent sign of Gilbert syndrome is an occasional yellowish tinge of the skin and the whites of the eyes as a result of slightly higher levels of bilirubin in the blood. In people with Gilbert syndrome, bilirubin levels may increase due to:  Illness, such as a cold or the flu Fasting or eating a very low-calorie diet Dehydration Menstruation Strenuous exercise Stress 
frequent sign gilbert syndrome occasional yellowish tinge skin whites eyes result slightly higher levels bilirubin blood  people gilbert syndrome  bilirubin levels may increase due to:  illness  cold flu fasting eating low-calorie diet dehydration menstruation strenuous exercise stress 
gilberts syndrome