40 clinically reviewed articles, written and peer-reviewed by the HealthRX.com Medical Team.
Showing 40 of 40 clinical reviews.
GLP-1 receptor agonists have been in clinical use since 2005. This review covers their full development timeline, cardiovascular outcome trial data, thyroid cancer signals, pancreatitis risk, and what two decades of prescribing tell us about real-world safety.
Levothyroxine can cause anxiety, especially at doses that push free T4 or free T3 above the normal range. Learn the mechanisms, risk factors, and clinical steps to resolve it.
Learn which blood tests, symptom criteria, and clinical guidelines doctors use to diagnose perimenopause, what FSH, estradiol, and AMH results actually mean, and when testing is worth pursuing.
GLP-1 receptor agonists slow gastric emptying and can delay the absorption of oral medications. Learn which drugs are most affected, what the clinical data shows, and how to time your doses safely.
Levothyroxine can reverse the modest weight gain caused by hypothyroidism, but it is not a weight-loss drug. Here is what the clinical evidence actually shows about thyroid hormone replacement and body weight.
Yes, menopause causes fatigue through hormonal shifts, sleep disruption, mood changes, and metabolic slowdown. Learn the clinical reasons and evidence-based strategies to restore your energy.
Cortisol, insulin, thyroid hormones, leptin, ghrelin, melatonin, and sex hormones all regulate your metabolism, sleep quality, and daily energy. Here is exactly how each one works and what to do when levels fall out of range.
Jessica Biel credits strength training, thyroid-aware nutrition, and recovery-focused protocols for her energy and physique at 40. Here is the science behind her methods and how hormonal health connects to fitness after 40.
A clinical guide to preconception hormone optimization covering thyroid, progesterone, insulin, androgens, and prolactin, with specific labs, timelines, and evidence-based interventions.
Evidence-based strategies for building muscle, losing fat, and optimizing hormones for women over 35, including thyroid considerations, protein targets, and resistance training protocols.
Estrogen drops during menopause shrink hair follicles and shorten the growth cycle, causing visible thinning. This clinical guide covers diagnosis, proven treatments, and realistic expectations so you can act with a clear plan.
Evidence-based guide to identifying and treating hormone imbalances that cause fatigue, irritability, brain fog, and low motivation. Covers thyroid, testosterone, estrogen, cortisol, and clinical treatment options.
Learn the clinical signs of a slowing metabolism, what lab tests to request, and evidence-based strategies to address metabolic decline before it affects your health.
Learn the early and severe warning signs of low blood sugar (hypoglycemia), what causes drops below 70 mg/dL, and evidence-based solutions to treat and prevent episodes.
Body-type dieting is largely a myth. Learn what actually predicts diet success, including thyroid function, insulin sensitivity, metabolic rate, and how to match your eating pattern to your hormonal profile.
Evidence-based guide to weight loss after 40 covering metabolic changes, thyroid screening, hormonal shifts, GLP-1 medications, and exercise strategies that overcome age-related resistance to calorie restriction.
Evidence-based strategies to improve sleep quality and support healthy hormone levels, including cortisol, growth hormone, testosterone, thyroid hormones, and insulin sensitivity.
Learn how to interpret TSH, free T4, free T3, testosterone, estradiol, and other hormone lab values with reference ranges, clinical context, and next steps.
Evidence-based treatments for postmenopausal hair thinning, including minoxidil, hormone therapy, spironolactone, and emerging options like low-dose oral minoxidil and PRP.
A physician-reviewed guide to thyroid lab tests for hypothyroidism, including TSH, free T4, free T3, and thyroid antibodies. Learn which panels to request, how to read results, and when retesting is warranted.
A comprehensive, physician-reviewed guide to at-home hormone testing: which tests are reliable, what the numbers mean, when to upgrade to a lab draw, and how to act on your results.
Evidence-based analysis of how endurance exercise affects testosterone levels, including thresholds, recovery strategies, and when to get tested.
Learn how gut dysbiosis disrupts estrogen metabolism, thyroid conversion, and cortisol signaling to stall fat loss in women. Evidence-based strategies to restore the gut-hormone axis.
Clinical evidence strongly supports taking levothyroxine on an empty stomach 30 to 60 minutes before eating. Learn why food, coffee, and supplements reduce absorption and what alternatives exist.
Hot flashes affect up to 80% of menopausal women. Learn the science behind vasomotor symptoms, which supplements have clinical evidence, and how hormone replacement therapy works.
Learn what an endocrinologist does, when to see one, conditions they treat, and how hormone specialists differ from primary care doctors.
Nutrition directly affects menopausal hair loss through iron, ferritin, zinc, biotin, vitamin D, omega-3, and protein pathways. Learn which nutrients to prioritize and which deficiencies to test for.
A clinical guide for women considering peptide therapies. Covers FDA-approved vs. compounded peptides, safety concerns, hormonal interactions, and how to evaluate peptide providers.
Standard lab panels miss functional thyroid problems, subclinical deficiencies, and early metabolic shifts. Learn which markers to request, why TSH alone is insufficient, and how to interpret results your doctor may not flag.
Persistent bloating, constipation, and digestive problems in women ages 35 to 55 may signal an underactive thyroid. Learn how thyroid hormones control gut motility, why perimenopause masks thyroid symptoms, and what testing to request.
A clinician-reviewed guide identifying contraindications, cautions, and high-risk populations for GLP-1 receptor agonist therapy, including semaglutide and tirzepatide.
After 35, hormonal shifts, muscle loss, and metabolic adaptation make standard calorie-cutting plans far less effective. Learn the physiology and what actually works.
Resistance training protects cognitive function during perimenopause and menopause by raising BDNF, preserving hippocampal volume, and improving insulin sensitivity. Here is the clinical evidence behind strength training for brain health in midlife women.
Naomi Watts has been vocal about exercising through menopause. Here is the clinical evidence behind why physical training during the menopausal transition protects cognition, mood, and long-term brain health.
Chronic stress disrupts cortisol, thyroid, sex hormones, and insulin signaling even in people with normal labs. Learn the clinical mechanisms and what to do about it.
A clinical breakdown of why short-duration calorie cycling produces measurable fat loss, how metabolic adaptation is minimized, and what the research says about 3-day dietary protocols.
Fatigue and weight-loss resistance after 35 often trace back to thyroid dysfunction, shifting hormones, and metabolic slowdown. Learn what lab tests to request, which conditions to rule out, and evidence-based treatments that work.
Standard blood work often overlooks hormonal imbalances by relying on narrow reference ranges and incomplete panels. Learn which tests to request, what optimal ranges look like, and how to advocate for thorough hormone evaluation.
Your gut microbiome influences immunity, metabolism, mental health, thyroid function, and chronic disease risk. Learn 5 evidence-based reasons to prioritize gut health, with real clinical trial data and practical steps.
After 35, hormonal shifts, muscle loss, and slower recovery make exercise feel tougher. Learn the science behind age-related fitness decline and evidence-based strategies to train smarter.