I had never heard of this, so I looked it up and found this on WebMD:
There isnÂt enough information available about the safety of adrenal extract when taken by mouth. But, there are serious concerns. Adrenal extract is made from adrenal glands gathered from slaughterhouses, and possibly from sick or diseased animals. Do not use adrenal extract from countries where a condition known as bovine spongiform encephalitis (BSE) has been reported, more commonly known as "mad cow disease." Countries where BSE has been reported include Great Britain, France, the Netherlands, Portugal, Luxembourg, Ireland, Switzerland, Oman, Belgium, and others. If you can't tell if the adrenal extract is from a country without BSE, don't use it.
Adrenal extract is UNSAFE when injected. There have been at least 50 reports of serious infection at the injection site.

Special Precautions & Warnings:
Pregnancy and breast-feeding: Not enough is known about the use of adrenal extract during pregnancy and breast-feeding. Stay on the safe side and avoid use.

Low immune system function: If your body is not able to fight disease normally because of low immune system function (for example, you have HIV/AIDS or you are taking medicines to prevent your body from rejecting an organ transplant) you might be more likely than other people to become infected if you take adrenal extract.

I think I would always run something like this by my doctor.

Thanks, Cyn. The particular brand of this supplement that Flyleft and I have been taking is derived from government-inspected, range-fed animals in New Zealand. I appreciate the info you've shared, and will definitely talk with my doctor about this.

Just didn't want anything bad happening to someone so nice! :) Having been to NZ and wanting to actually move there (except now we're too old), I do know environment and, therefore, health is a top priority.