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By ZRT Laboratory.  Most hormones are produced by a group of glands known collectively as the endocrine system. Even though these glands are located in various parts of the body, they are considered one system because of their similar functions and relationship to each other. Hormones are secreted into the bloodstream by these glands. From there, they travel to all parts of the body playing the role of chemical messengers turning specific target tissues on or off. Because they can’t be stored in the cells, hormones do their work as they pass through and then they’re gone. As a result,...

Posted by ZRT Laboratory, Dr. Sherry LaBeck. Hello summer! The ZRT docs and staff have compiled some tasty recipes to include for your family picnics or impromptu gatherings with friends.  From a refreshing herbal beverage and a cool creamy soup to a zesty, peppery corn dip and tangy, nutty quinoa salad, the foods that make up summer fare can be simple to prepare as well as delicious. The addition of spicy, savory grilled chicken thighs boosts the protein up a notch. Then top these off with a delectable mini muffin containing nut butter and chocolate chips! What more could you want?...

Posted by Dr. Kate Placzek, ZRT Laboratory. Testosterone, so meaningful to a man’s behavior, is the evolutionary force behind everything intrinsically “male.”   Historical stereotypes peg testosterone as the macho elixir of legendary magnitude – the “chest-thumping hormone of aggression.” New research, however, is beginning to tease out previously unknown subtleties of testosterone’s effects on behavior. Testosterone is non-trivial for social functioning –  increasing levels enhance generosity [1], cooperation [2], and honesty [3], thereby emphasizing that its effects in shaping male psychological makeup are infinitely more complex than previously thought. New Study Points to Altered Consumer Preferences after Testosterone Dosing...

Posted by Dr. Allison Smith, ZRT Laboratory. GABA - Gamma-aminobutyric acid, is the neurotransmitter known for its affinity for GABA receptors throughout the central nervous system (CNS). It acts to inhibit excitatory processes – whether they be normal or pathological. It's synthesized from the excitatory neurotransmitter glutamate in a process that requires vitamin B6 as a cofactor. The delicate balance in the brain between GABA and glutamate is orchestrated by shuttle systems from the Krebs Cycle, the presence of NMDA and GABA receptor modulators, enzyme cofactors, and reuptake mediators.   In the rest of the body, GABA plays a myriad of...

ZRT Laboratory introduced the Fertility Profile to assist women in identifying possible hormonal causes of infertility. More recently ZRT launched the Menstrual Cycle Mapping (MCM) test that allows women to map time points throughout their menstrual cycle, measuring levels of estrogen, progesterone and luteinizing hormone (LH). Since the MCM test was introduced there has been some confusion as to which test is best to evaluate fertility/infertility. The aim of this blog is to clarify the differences between the two tests and when best to use each. Menstrual Cycle Mapping The MCM profile measures estrone-3-glucuronide (E1G), pregnanediol-3-glucuronide (PDG) and luteinizing hormone...