By Dr. John A. Robinson, NMD & Dr. Cristina Romero-Bosch, NMD The Hormone Zone For decades, testosterone in women has been discussed primarily through the lens of libido, muscle, energy and sexual health. When fertility enters the conversation, estrogen, progesterone, FSH, LH and AMH tend to dominate. But testosterone deserves a place in that conversation […]
By Dr. John A. Robinson, NMD & Dr. Cristina Romero-Bosch, NMD The Hormone Zone For nearly 20 years, we have used a therapeutic total testosterone range of approximately 70–150 ng/dL in appropriately selected women. This has never been about simply pushing a laboratory number higher. Our approach developed from years of treating women, following symptoms
By Dr. John A. Robinson and Dr. Cristina Romero-Bosch For years, we have told our patients at The Hormone Zone that menopause does not mean the ovaries suddenly become useless organs. Yes, ovarian production of estradiol and progesterone changes dramatically as reproductive function ends, but we have never believed that the absence of ovulation means
By Dr. John A. Robinson, NMD & Dr. Cristina Romero-Bosch, NMD The Hormone Zone GLP-1 medications have transformed the conversation around weight loss, but their effects go far beyond the scale. Semaglutide and tirzepatide influence insulin sensitivity, inflammation, appetite, cardiovascular risk, reward signaling—and increasingly, we are learning, sexual and reproductive health. Three recent papers in
By Dr. John A. Robinson and Dr. Cristina Romero-Bosch For decades, menopause has been treated primarily as a hormonal event: estrogen declines, periods stop, and women may experience hot flashes, sleep disruption, vaginal dryness, changes in body composition, mood changes and bone loss. But emerging research suggests something much bigger is happening. The menopausal transition
By Dr. John A. Robinson, NMD When we think about the pillars of longevity, we usually focus on exercise, nutrition, sleep, stress management, and metabolic health. These are unquestionably important, but there is another aspect of human health that is often overlooked: sexual wellness. Many people think of sex as simply a quality-of-life issue. However,
By Dr. John A. Robinson, NMD Menopause changes much more than a woman’s menstrual cycle. It changes how she feels in her own body. Vaginal dryness develops, intimacy becomes uncomfortable, urinary symptoms become more frequent, and many women begin avoiding sexual activity because they anticipate pain. Too often, they are told these symptoms are simply
Why Estradiol Is One of the Most Important Brain Hormones for Mood, Motivation, and Longevity For decades, estrogen was viewed primarily as a reproductive hormone. Today, neuroscience paints a much broader picture. Estradiol (17β-estradiol), the primary form of estrogen in premenopausal women, is one of the brain’s most powerful neuromodulators. Beyond its traditional hormonal roles,
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A growing body of research is finally validating something that many of us in functional and longevity medicine have recognized clinically for years: the gut microbiome, estrogen metabolism, liver detoxification pathways, mood, inflammation, and menopausal symptoms are all deeply interconnected. Recent literature reviewing menopause, gastrointestinal dysfunction, and the gut microbiome highlights how declining estrogen levels
For years, women were told to fear soy because it “acts like estrogen.” Unfortunately, this oversimplified message ignored how soy actually behaves in the human body and failed to distinguish between traditional whole soy foods and modern industrialized soy products. A recent review published in Nutrients adds to the growing body of evidence suggesting that real soy
