Prostaglandins are powerful substances that can produce pain and inflammation.

You now have an extremely powerful substance that can be used in a variety of applications.

Such a powerful substance would transform everything it was applied to; leaving something very different in its wake.

She had consumed the powerful substance too, unintentionally, and her mind was reeling out of control.

Almost daily, new studies reveal more about the powerful substances found in particular foods, and how they may improve our health and/or prevent disease.

It's also hazardous, because most age-erasing doctors aren't trained in using these powerful substances.

That's why steroids are such powerful substances when they are unleashed in the human body.

It's a powerful substance that will immobilize a person for a time.

It's strictly forbidden to keep powerful substances like this in a hospital public ward.

Pesticides are powerful substances, but when used according to the label they are safe and effective.