1.   Although it is possible some of these athletes injected hGH, there is no way of differentiating it from the natural hormone.

2.   At a news conference Thursday, scientists called for more study into endocrine disrupters, a family of environmental pollutants thought to interfere with natural hormones.

3.   Birth-control pills suppress the action of natural hormones.

4.   Almost all hGH in use today is biosynthetic, identical to the natural hormone produced in the pituitary gland at the base of the brain.

5.   But though Lucky has stipulated that its suppliers not provide treated milk, there is no test to distinguish the natural hormone from the genetically engineered BST.

6.   Colborn gathered evidence that young embryos are vulnerable to even minute amounts of chemicals that mimic or counteract natural hormones.

7.   DHEA is a natural steroid hormone that is pumped out vigorously by the adrenal glands in youth and early adulthood.

8.   Health care specialists recommend women consult with someone knowledgeable in the field before taking natural hormones.

9.   It is an estrogen-like compound that acts in the breast as an antiestrogen, preventing the natural hormone from stimulating the growth of breast cancer cells.

10.   MELATONIN This natural hormone, produced by a gland at the base of the brain, appears to help regulate your sleep cycle.