Over my many years as a doctor, nutrition expert, and web site information provider, I have been asked many times regarding my thoughts on glandulars. Many patients have the impression that if they ingest a glandular tissue or extract from an animal, the particular organ that they are thinking of improving, such as their adrenal glands, will improve if they take an adrenal glandular. Are they right?
     In addition to herbs and plants, healers in the past (and currently) used tissue extracts as one armamentarium in the fight against disease. For instance,  extract of bone marrow has been used for the treatment of anemia. Desiccated thyroid is still used by many alternative practitioners in the management of hypothyroidism. Many people take glandulars as a perceived source for natural hormones. Glandulars may also contain enzymes, vitamins, fatty acids, amino acids, minerals, neurotransmitters and a host of nutrients.

Dr. Sahelian's opinion on Glandulars
I have not studied glandulars in detail, but my impression is that they probably have a role to play in health and disease when used as a supplement, but it just seems that this area is very difficult and complicated to research since we would not be testing a single substance or hormone, such as cortisol, but a number of different substances are present within each glandular extract. Scientists find it much easier to isolate a particular molecule and test it by itself as opposed to testing a tissue extract. But, for instance, let's take brain tissue. If brain tissue was consumed, one would expect to ingest hundreds of different components that are present within brain tissue. One of these components would be the long-chained fatty acids EPA and DHA. It is quite likely that the omega-3 oils could improve brain function. I won't even discuss the potential benefits of other components in brain glandulars such as sphingomyelin, phospthatidylserine, etc.
    Hence, it does make sense that eating brain tissue could improve mental function. Would the same principle apply to other glandular tissues? Thyroid glandulars could improve thyroid function in those who are hypothyroid. But, would eating heart tissue improve heart function? I don't know.
     There's also another factor to consider: prions. I don't know whether brain glandulars could potentially be contaminated with these infectious agents. I have not studied this field in depth to know for sure.

What is the definition of Glandulars?
Glandulars, as promoted by those in the natural health industry,  refer to raw animal glandular and nonglandular tissues or extracts of these tissues. These tissues and extracts are normally dried and ground-up.

What are common Glandulars?
There are many tissues, organs and glands in the body of animals. Commonly, most people who buy glandulars use the following: thyroid glandular, adrenal glandular, thymus glandular, testis, ovary. Less frequently used glandulars are from the pituitary, kidney, liver, pancreas, spleen, lung, heart, brain, uterus and prostate glandular.

Which animals do Glandulars come from?
Glandulars can theoretically come from any animal, but most often they are derived from cow (bovine).  Others come from pig (porcine) and sheep (ovine).

What are potential uses of glandulars?
The different glandulars and glandular extracts have various activities. Thymus and spleen extracts may influence the immune system. Thyroid extracts could help with low thyroid. Adrenal extracts may have anti-inflammatory activity. Testis extracts may influence androgen levels, and ovary extracts may influence estrogen levels.
     The problem with glandulars is that 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.

How do Glandulars work?
Glandulars contain may substances including hormones. The major problem that arises is 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 glandulars, 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.

Desiccated Thyroid Glandular
Desiccated thyroid is the dried and powdered thyroid gland. During the process of preparing this glandular, the fat and connective tissue are removed. Desiccated thyroid is often from hogs, but may also from cows and sheep. Desiccated natural thyroid is available as a prescription drug for the management of low thyroid. The pharmaceutical preparation is standardized and contains both thyroxine and triiodothyronine. There are countless over the counter thyroid extracts marketed as dietary supplements but they probably do not have any significant hormones in them.

Thymus Glandulars
Thymus extracts could have substances that influence the immune system, but it is very difficult to know what kind of short term and long term effect these glandulars have on the immune system. There are countless immune substances in the body and it is extremely difficult to predict all the potential interactions when ingesting a thymus glandular. Furthermore, there could be wide variations in response between different people.

Adrenal Glandulars
Adrenal extracts may contain some cortisol. Cortisol does have anti-inflammatory and anti-allergic activities, but the amount of cortisol in the supplements is likely to be too low to have meaningful physiological activity.

Testis and Ovary Glandulars
Testis and ovary extracts may contain testosterone and estrogen, respectively, but again, the amount of these hormones in the glandular supplements are unlikely to be significant.

Glandular Fever
Glandular fever is an infectious disease occurring most commonly in children and adolescents. In children the infection may be unrecognized or with only a few days of a mild illness with sore throat, fever, swollen tonsils. In young adults, the disease is often abrupt in onset with profound tiredness, aching muscles, fever, very swollen tonsils and enlarged neck glands. There may be a short or prolonged period (days or weeks) after the initial illness when the tiredness continues and the patient may feel dispirited and depressed. Glandular fever is sometimes known as infectious mononucleosis and is caused by the Epstein-Barr virus.

Glandular emails
Q. While looking for tryptophan information I came across your web site. My question is about the adrenal glands - is it possible to really rebuild them ? Do glandulars really work. What aryurvedic herbs would really nourish and support them. Is there a formula (haven't seen any.)

Q. I have been taking raw bovine thyroid glandular over the counter from a health food store for about 5 years. I take the recommended dose. I noticed a great change after the first few days taking it. My body warmed, I had clearer thoughts, and eventually a thin place on my scalp re-grew hair. I dont want to stop but I am concerned about safety. I had a hysterectomy at 32, no ovary function by 42, and am 53 now. I cannot take HRT as I had breast cancer at 30. Thyroid test I had done did not show low thyroid, but my body told me differently.

Q. Can soy protein (e.g., shakes, bars) interfere with the absorption of supplemental thymus glandular?
   A. I don't know.

Q. I've taken an herbal complex before that contained adrenal, orchic, thymus, and pituitary glandular substances in it. I was just wondering what these glandulars are and if they are safe to take?
   A. There are no standards in glandular products so it is difficult to make any statements that would apply to all products. Each glandular product has to have its own clinical testing to determine its benefits and risks.