1.   Gen is in the hormone study, which will attempt to decide if women are better off to supplement diminished hormones with synthetic substitutes or go it alone.

2.   No synthetic substitutes such as methadone.

3.   Now, makers of dietary supplements that include a component of the herb called ephedrine or its synthetic substitute market their products as legal ways to get high.

4.   Synthetic substitutes are out.

5.   The latest, a synthetic substitute, is potentially dangerous, say critics, and could cause widespread health problems years from now.

6.   What they could not import, they had to do without or, as archeologists have now discovered, learn how to make synthetic substitutes.

7.   What they could not import, they had to do without, or, as archeologists have now discovered, learn how to make synthetic substitutes.

8.   Synthetic substitutes are available, but profit margins are much higher for authentic bear gall products.

9.   Some subsequent studies have indicated that the synthetic substitute was less effective than the natural product.