The chemicals in eyebright might act as astringents and kill bacteria.

These chemicals act as effective sporicides in a variety of library settings.

We now know a lot more about the mechanisms of how these chemicals act in biological systems.

These chemicals acts as messengers within or between species.

These chemicals can act like the hormone estrogen in the body.

Now that scientists know more about how chemicals act in the bodies of laboratory animals and in humans, these figures are being revised.

The active chemicals in arnica may reduce swelling, decrease pain, and act as antibiotics.

This chemical acts as the conditioning ingredient, providing moisture and fullness to the hair.

The chemicals act as preservatives and, in some cases, contribute to a scent.

Both chemicals act to break down the structure of the hair deep into the root, delaying regrowth up to several weeks.