The presence of obsessions or compulsions, or both, are what distinguishes obsessive-compulsive disorder from other conditions. The obsessions or compulsions cause marked distress, are time-consuming, and interfere with a person's normal functioning.
(1989) concluded that everyone excretes stinky compounds in their urine after eating asparagus, and the only variation is in ability to smell them. Other papers using chemical tests and carefully controlled smelling tests show that there is variation in excretion of sulfur compounds in urine after eating asparagus.
Asparagus has also been reported to change the colour of urine, giving it a greenish tinge, something that is also associated with beetroot. In some individuals, the potentially disturbing effect can be pink or red urine. This can lead to the false impression of blood appearing in the urine (haematuria).