He used the gene for a powerful hormone known as erythropoietin, which spurs the bone marrow to churn out more red blood cells.

Extra doses of powerful hormones are a different matter.

Other investigators are employing powerful hormones like interferon and interleukin-2 to stimulate an immune response in patients.

All those wickedly powerful little hormones.

But now we're learning that it's very likely that this very powerful and necessary hormone has been incorporated into many other systems in our body.

But the conundrum is, because it is a powerful hormone, we can't put it in our food supply.

The belief is that if the animal is violently agitated, more of its powerful sexual hormones will be released.

If I say that too loud, the dairy industry will be on me, but there are a lot of powerful hormones in milk.

Because DHEA is a powerful hormone, it is not recommended for children or for women who are pregnant or breastfeeding.

The body's stress response floods the brain with powerful hormones.