Abstract
Welcome to an in-depth exploration of complex hormonal scenarios we frequently encounter in our integrative practice. Today, I want to take you on a journey through the intricate world of hormone replacement therapy (HRT), thyroid management, and the crucial role of individualized patient care. Drawing from the latest evidence-based research and extensive clinical experience, we will dissect common challenges, from managing low iron stores and choosing the right progestins to navigating hormone therapy after a cancer diagnosis. This post will illuminate the physiological underpinnings of these conditions and explain the reasoning behind our treatment protocols. We will also explore how integrative chiropractic care complements our functional medicine approach, addressing the body's structural and neurological integrity to optimize overall health outcomes. My goal is to demystify these topics, providing clarity and empowering you with knowledge grounded in modern science.
Optimizing Iron Stores: The Foundation of Energy and Vitality
One of the most fundamental yet frequently overlooked aspects of patient health is their iron status. When I see a patient presenting with fatigue, brain fog, or poor exercise tolerance, one of the first things I investigate is their iron levels, specifically serum iron and serum ferritin. Ferritin is a protein that stores iron and releases it in a controlled fashion, making it an excellent indicator of the body's total iron reserves.
Leading researchers in this field, such as Dr. Pasas, emphasize that a serum ferritin level below 30 ng/mL is often insufficient for optimal physiological function, even when other markers fall within the "normal" range. In my clinical observations, I have seen that patients with low ferritin levels struggle significantly, and that simply supplementing with oral iron doesn't always resolve the problem.
Identifying the Root Cause of Low Iron
When we find low iron, our work as functional medicine practitioners is to ask, "Why?" A low level is a symptom, not a final diagnosis. We must investigate the underlying cause, which can stem from several issues:
Absorption Issues: Is the patient's gut health compromised? Conditions such as celiac disease, low stomach acid (hypochlorhydria), or small intestinal bacterial overgrowth (SIBO) can severely impair the absorption of iron and other essential minerals.
Chronic Blood Loss: This is a major factor, particularly in menstruating women. Heavy periods can quickly deplete iron stores. It's also critical to rule out gastrointestinal (GI) bleeding, which can be occult (hidden) and point to more serious conditions like ulcers or inflammatory bowel disease. In neonates, there's a phenomenon sometimes called the "pink hour" during which blood loss can be a concern and requires close monitoring.
Dehydration: While it doesn't directly cause iron loss, dehydration can concentrate blood markers, potentially masking an underlying deficiency. Proper hydration is foundational to all cellular processes, including nutrient transport.
Replenishing iron takes time and a targeted approach. We must address the root cause while simultaneously providing the necessary iron in a form the body can absorb and utilize, ensuring the patient can rebuild their stores and regain their vitality.
Navigating the Complex World of Progestins and IUDs
Hormonal contraceptives, particularly intrauterine devices (IUDs), are a common topic of discussion in my practice. Many patients are on hormonal IUDs like Mirena, which primarily release a type of synthetic progesterone called a progestin. It is crucial to understand that not all progestins are created equal.
There are different families of progestins, and their effects on the body can vary dramatically, especially with respect to side effects such as mood changes and the risk of blood clots (thrombosis).
Levonorgestrel: the progestin found in the Mirena IUD. One of its key benefits is that its action is primarily localized to the uterus. It thickens cervical mucus and thins the uterine lining (endometrium), exerting its contraceptive effect with minimal systemic absorption. This localized action is why it generally carries a lower risk of systemic side effects, such as blood clots, than oral progestins.
Norethindrone: This is another class of progestin, often found in oral contraceptives.
Drospirenone: Found in some newer oral contraceptives, this progestin belongs to a different family and may have a different side effect profile, potentially with a lower risk of thrombosis than older progestins.
When a patient has a hormonal IUD, it provides enough progestin to protect the endometrium from unopposed estrogen, but it typically doesn't provide the systemic benefits that bioidentical progesterone offers for the brain, bones, and sleep. Therefore, if a patient on an IUD requires hormone replacement for menopausal symptoms, we can still add oral or sublingual bioidentical progesterone to their regimen to achieve these protective, systemic effects. For patients who are sensitive to oral progesterone, sublingual troches are an excellent alternative. A sublingual dose is roughly twice as potent as an oral dose because it is absorbed directly into the bloodstream, bypassing first-pass hepatic metabolism. A 50 mg sublingual dose, for example, can provide an effect similar to that of a 100 mg oral capsule.
The Role of Cortisol and Thyroid in Hormonal Balance
No discussion of hormonal health is complete without addressing the hypothalamic-pituitary-adrenal (HPA) axis and thyroid function. Cortisol and thyroid hormones are master regulators of metabolism, energy, and stress response. When a patient isn't feeling well despite seemingly balanced sex hormones, I immediately turn my attention to these systems.
Assessing Cortisol Levels
A single morning serum cortisol level provides only a brief snapshot of a dynamic 24-hour process. To truly understand a patient's adrenal function and their daily cortisol rhythm, a four- or five-point salivary cortisol test is the gold standard. This test measures cortisol levels at key points throughout the day—morning, noon, afternoon, and night—revealing the person's unique circadian pattern. It helps us identify issues like:
An exaggerated morning spike (indicating high stress).
A blunted or flat curve (suggesting HPA axis dysfunction or "adrenal fatigue").
A reversed curve with high cortisol at night (a common cause of insomnia).
This detailed map allows us to create a highly targeted treatment plan using adaptogenic herbs, nutritional support, and lifestyle modifications to restore a healthy rhythm.
Understanding Thyroid Conversion
Many patients come to me on Synthroid (levothyroxine), a T4-only medication, yet they still suffer from thyroid symptoms like fatigue, weight gain, and hair loss. The problem often lies not in the T4 dose but in the body's ability to convert the inactive T4 hormone into the active T3 hormone.
Giving a large dose of T4 all at once is not physiological; the body naturally produces thyroid hormone continuously. This sudden influx can trigger a protective mechanism in which the body shunts T4 into the pathway that produces reverse T3 (rT3), an inactive metabolite that blocks T3 receptors. I've seen patients on a dose as low as 25 mcg of levothyroxine develop elevated rT3.
This is why I often prefer using desiccated thyroid extract (like Armour Thyroid or NP Thyroid). This medication contains the full spectrum of thyroid hormones—T4, T3, T2, and T1—mimicking the natural output of a healthy thyroid gland. The body recognizes this combination, leading to better physiological effects and a lower likelihood of elevating reverse T3. When a patient has high rT3, the only effective solution is to lower or discontinue the T4-only medication and switch them to a T3-containing preparation to clear the receptors.
Testosterone Therapy: Considerations for Men's Health and Fertility
Testosterone replacement therapy (TRT) can be life-changing for men with clinically low levels, but it requires a thoughtful and well-managed approach, especially in younger men concerned about fertility.
When a man starts exogenous testosterone, his brain's pituitary gland senses the high level and shuts down its own production of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH). This process, known as negative feedback, halts the testicles' natural production of both testosterone and sperm. For men who wish to preserve fertility, this is a significant concern.
Strategies for Preserving Fertility
Clomid (Clomiphene Citrate): For a younger man in his 20s or 30s who has low testosterone and is trying to conceive with his partner, I may use Clomid for a short period (3-6 months). Clomid is a selective estrogen receptor modulator (SERM). It blocks estrogen receptors in the brain, tricking the pituitary into thinking estrogen levels are low. In response, the pituitary ramps up production of LH and FSH, which in turn stimulates the testicles to produce more testosterone and sperm. It's a highly effective short-term strategy to boost fertility and testosterone simultaneously. However, long-term estrogen receptor blockade is not safe or advisable.
Lifestyle and Nutritional Intervention: Before jumping to TRT in younger men, I always prioritize foundational health. I've seen remarkable transformations by focusing on diet, exercise, stress reduction, and targeted supplementation with nutrients like Vitamin D and B vitamins. Correcting these fundamentals can often restore a man's testosterone levels from the 300s to the 700s or 800s over 6-9 months without any hormonal intervention. The body has an incredible capacity to heal and rebound when given the right building blocks.
Hormone Therapy After Breast Cancer: A Nuanced, Patient-Centered Approach
This is perhaps one of the most sensitive and challenging areas of hormone management. The conventional approach, especially after a diagnosis of hormone receptor-positive breast cancer, is to suppress hormones, often with drugs like Tamoxifen or aromatase inhibitors. However, this "one-size-fits-all" model fails to account for the individual patient, the protective roles of certain hormones, and the devastating impact of hormone deprivation on long-term health.
First, let's clarify terminology. Ductal Carcinoma in Situ (DCIS), often labeled "stage zero cancer," is, by definition, a pre-cancerous condition. It is not invasive cancer. Yet, the standard medical-industrial complex often treats it with the same aggressive, lifelong monitoring and hormone suppression as invasive disease. This approach must be questioned.
Re-evaluating Hormone Receptors
The presence of an estrogen receptor (ER) or progesterone receptor (PR) on a cell is not inherently bad. Nearly every cell in the body has these receptors because hormones play vital roles throughout the body. The progesterone receptor, in particular, is known to be protective. Oncologists often see a receptor and assume it's a target that must be blocked, but this view is overly simplistic and ignores the complex biology of cellular health.
My approach to a breast cancer survivor is deeply individualized and based on a collaborative discussion with the patient.
Case 1: The Long-Term Survivor: A patient who had bilateral mastectomies 20 years ago for ER-positive cancer and is now severely symptomatic from menopause. She has no breast tissue. What are we afraid of? In this case, after a thorough discussion of the theoretical risks and the significant quality-of-life benefits, I am comfortable offering her estrogen therapy. The risk of not treating her—and thereby increasing her risk for Alzheimer's disease, heart disease, osteoporosis, and diabetes—is far greater than the hypothetical risk of estrogen in a woman with no breasts.
Case 2: The Recent Diagnosis: A patient who just finished radiation for a stage two cancer six months ago. She is still in the acute phase of her treatment and recovery. This is a completely different scenario. I would absolutely not start hormone therapy at this time.
Case 3: The Informed Patient: I recently had a patient in her 80s who was diagnosed with a tiny, stage zero lesion. Her oncologist recommended she stop her long-term hormone therapy and start Tamoxifen. She came to me, and after our discussion, she "fired" her oncologist. She signed an informed consent waiver, acknowledging she understood the conventional recommendations but chose to prioritize her quality of life. She is now feeling wonderful again with her hormones.
Every patient's history, timeline, type of cancer, and personal risk tolerance are different. Blanketly saying "no" to all breast cancer survivors is not evidence-based medicine; it is dogma. It is our job to engage in critical thinking, educate our patients, and help them make informed decisions that align with their health goals.
The Role of Integrative Chiropractic Care
In our comprehensive approach to patient wellness, we cannot ignore the physical structure that houses all of these complex biochemical processes. Integrative chiropractic care is a cornerstone of our practice because the nervous system is the body's master controller, including the endocrine system.
Misalignments in the spine, particularly in the upper cervical and thoracic regions, can create nerve interference that disrupts the signaling between the brain and the endocrine glands (the thyroid, adrenals, and ovaries/testes).
HPA Axis Regulation: By performing precise chiropractic adjustments, we can reduce physical stress on the nervous system. This helps to down-regulate the sympathetic "fight-or-flight" response and promotes a more balanced parasympathetic "rest-and-digest" state. This has a direct, calming effect on the HPA axis, helping to normalize cortisol rhythms.
Improved Blood Flow and Nerve Supply: Correcting spinal structure improves blood flow and nerve energy to the organs. For a patient with a sluggish thyroid, ensuring that the nerve supply from the cervical spine to the gland remains unimpeded can enhance glandular function and responsiveness to treatment.
Pain Reduction and Systemic Inflammation: Chronic pain is a significant physiological stressor that elevates cortisol and inflammatory cytokines, further dysregulating hormonal balance. Chiropractic care is exceptionally effective at reducing musculoskeletal pain, which in turn lowers the body's overall inflammatory burden.
From my clinical experience at our wellness center, patients who combine functional medicine protocols with regular chiropractic care achieve faster, more profound results. Their bodies are better able to adapt to, heal from, and integrate the hormonal and nutritional changes we are making. This synergy is the essence of true, holistic healthcare.
References
American College of Obstetricians and Gynecologists. (2020). Hormone therapy for postmenopausal women. ACOG Practice Bulletin, No. 141.
Shufelt, C. L., & Manson, J. E. (2021). Menopausal hormone therapy and cardiovascular disease: The role of timing, formulation, and route of delivery. Journal of the American Heart Association, 10(9), e020633. https://doi.org/10.1161/JAHA.120.020633
Glintborg, D., & Andersen, M. (2017). Management of endocrine disease: An update on the pathogenesis, diagnosis and treatment of polycystic ovary syndrome. European Journal of Endocrinology, 176(2), R53-R65. https://doi.org/10.1530/EJE-16-0375
Kelly, D. M., & Jones, T. H. (2013). Testosterone: A metabolic hormone in health and disease. Journal of Endocrinology, 217(3), R25-R45. https://doi.org/10.1530/JOE-12-0455
The information herein is not intended to replace a one-on-one relationship with a qualified healthcare professional or licensed physician and is not medical advice. We encourage you to make healthcare decisions based on your research and partnership with a qualified healthcare professional. Our information scope is limited to chiropractic, musculoskeletal, and physical medicine, as well as wellness, sensitive health issues, and functional medicine articles, topics, and discussions. We provide and facilitate clinical collaboration with specialists across disciplines. Each specialist is governed by their professional scope of practice and the jurisdiction in which they are licensed. We utilize functional health and wellness protocols to treat and support care for musculoskeletal injuries or disorders. Our videos, posts, topics, subjects, and insights cover clinical matters and issues that directly or indirectly support our clinical scope of practice. Our office has made a reasonable effort to provide supportive citations and identify relevant research studies for our posts. We provide copies of supporting research studies upon request to regulatory boards and the public.
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Dr. Alex Jimenez, DC, MSACP, APRN, FNP-BC*, CCST, IFMCP, CFMP, ATN
email: coach@elpasofunctionalmedicine.com
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Dr. Alex Jimenez, DC, APRN, FNP-BC*, CFMP, IFMCP, ATN, CCST
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