[Suri]

The progesterone in BO comes directly from the glands. It is produced there and although some manufacturers claim that the glands are hormone-free there is just no way of extracting them or clearing them from the tissue.

You can't even remove adenomas from the tyroid or adrenal glands. The whole gland needs to be removed if this occurs. Then how would you be able to remove all the hormones. Claiming this is an outright lie.
Hormones and other substances that the glands naturally contain are the whole point of them working.

Glandular contain many substances including hormones. The major problem that arises in not knowing how much of these hormones or other substances are available in these extracts since they could vary from batch to batch and animal to animal. Also, since there are so many substances within these glandular, it is difficult to know which of the substances is having a therapeutic influence and how they interact with the myriad other substances in the body.

source:
http://www.drlam.com/articles/Adrenal_Fa...herapy.asp

Due the the lack of standardization, there are many products on the marketplace available to the consumer. Not all are created equal. [...] Isocort is a popular over-the-counter freeze dried adrenal cortex glandular supplement containing herbs and medium chain triglycerides that may have cortisol like properties. It’s advertised as providing a standardized, stable, and “gentle” dose of the adreno-cortical substance equivalent to 2.5 mg of cortisol per tablet. [...]No actual cortisol is in the ingredient’s list. (emphasis added)

This is an example of an adrenal glands product but the same goes for any glandular supplement.

The customer service should have told you that the progesterone comes from the BO itself like crystalelle has pointed out. But I guess they are too afraid that people won't buy their product if they tell them that they are ingesting animal hormones.

Because they have so many substances in them it is difficult to determine and measure what kind of effect they may have in the long run when ingested as a supplement. Nevertheless, there is little doubt that glandular do possess healing properties if used properly based on antidotal evidence for over 80 years.

Nevertheless should should bear in mind that they are still animal hormones and most of them are not identical with our own hormones (or enzymes). The same goes for herbs. So BO is neither superior nor inferior to herbal supplements. They just contain more substances and in different amounts while herbs usually only contain estrogen-like substances.

But they might (both) have an advantage over synthetic hormones (such as in bcp) since they are far more potent and lacking many of the beneficial effects of the original hormones.

Another link on glandulars supplements. It's for animals actually but I don't think those supplements are any different.

http://goods.us.marketgid.com/goods/2221/134523/

Hope this helps a bit.