Quoting from: http://www.standardprocess.com/lit/tabsheets/neuroplex5850.pdf "Abstract: Neuroplex Contains Bovine Brain Tissues, Vitamins, Minerals, And Co-Enzymes To Maintain Healthy Function Of The Nervous And Endocrine Systems The use of glandular therapy, in which specific animal organ and gland tissues are ingested for the concentrated nutrients present in them, has had a long history of use across a variety of cultures. The basic premise in glandular therapy is "like heals like. Bovine brain tissues like the pineal, hypothalamus, and pituitary, are combined with bovine liver and spleen in Neuroplex, to provide concentrated nutrients that are especially supportive to their parallel tissues in the human body. Vitamins and minerals contained in Neuroplex enable enzymes and hormones to function properly, contributing to the healthy maintenance of the nervous, endocrine, and immune systems, as well as other control functions for the body." Quoting from: http://www.hhs.gov/news/press/2004pres/20040126.html The first interim final rule will ban the following materials from FDA-regulated human food, (including dietary supplements) and cosmetics: Any material from “downer” cattle. (“Downer” cattle are animals that cannot walk.) Any material from “dead” cattle. (“Dead” cattle are cattle that die on the farm (i.e. before reaching the slaughter plant); Specified Risk Materials (SRMs) that are known to harbor the highest concentrations of the infectious agent for BSE, such as the brain, skull, eyes, and spinal cord of cattle 30 months or older, and a portion of the small intestine and tonsils from all cattle, regardless of their age or health; and The product known as mechanically separated beef, a product which may contain SRMs. Meat obtained by Advanced Meat Recovery (an automated system for cutting meat from bones), may be used since USDA regulations do not allow the presence of SRMs in this product.