11.   Even when athletes are tested, scientists are unable to tell synthetic versions of hormones from those that exist naturally in the body.

12.   He believes drug companies that produce synthetic versions of the natural chemicals in urine would lose millions of dollars if ingesting urine became an accepted practice.

13.   Ill patients also have legal alternatives to marijuana, including other nausea-fighting drugs and a synthetic version of cannabis.

14.   It keeps track of which spices are taken from the rack, and it releases a synthetic version of the scent of the spice in use.

15.   It tastes slightly bitter, and a synthetic version traditionally has been used as flavoring in soft drinks and chocolate.

16.   Its availability has increased and price decreased because a synthetic version is being produced worldwide.

17.   Leaders of the foundation said there is already a shortage of the two other synthetic versions of the drugs, known as blood-clotting factors.

18.   Most products contain synthetic versions of both estrogen and progesterone.

19.   OxyContin had broader appeal because it contained a synthetic version of morphine called oxycodone, which, among other things, carried less of a social stigma.

20.   Pramlintide is a synthetic version of human hormone amylin, which is absent in insulin-using diabetics.