Endocrinology
Conditions
Deep dives — Diabetes Mellitus: Type 1 vs Type 2 vs LADA & MODY · hemoglobin A1c, Fructosamine & Glycation Markers · CGM & Time-in-Range · Insulin Types & Dosing Strategies · Cardio-Renal Protection: sodium-glucose cotransporter-2 (SGLT2) & glucagon-like peptide-1 (GLP-1) · Remission & Reversal Strategies · Complications: Retinopathy, Nephropathy, Neuropathy · Hypoglycemia Awareness & Prevention
Deep dives — Hashimoto's Thyroiditis: TPO & TgAb Antibodies Explained · thyroid-stimulating hormone (TSH), T4, T3 Optimal Ranges · Levothyroxine vs NDT vs T3 · AIP & Gluten Elimination · Selenium, Zinc, Iron, Iodine · Reverse T3 & Low T3 Syndrome · Pregnancy & Hashimoto's · Hashimoto's, postural orthostatic tachycardia syndrome (POTS) & mast cell activation syndrome (MCAS) Overlap
Deep dives — Insulin Resistance: Fasting Insulin & homeostatic model assessment of insulin resistance (HOMA-IR) · CGM for Non-Diabetics · Reversal: Diet & Fasting · Insulin Resistance & polycystic ovary syndrome · Metabolic Syndrome & CV Risk · non-alcoholic fatty liver disease (NAFLD) / metabolic dysfunction-associated steatotic liver disease (MASLD) Connection · Exercise & Muscle Sensitivity · Metformin, Berberine & glucagon-like peptide-1 receptor agonists (GLP-1s)
Endocrinology deals with hormone-related disorders and metabolic conditions affecting the thyroid, adrenal, pituitary, and parathyroid glands.
Interactive Visualization glucagon-like peptide-1 & Incretins β fire the gut hormone behind the new weight-loss drugs Eat a meal and watch your gut fire glucagon-like peptide-1 at the pancreas, brain and stomach at once β then see how Ozempic-style drugs resist the enzyme that destroys it in two minutes. Launch → Interactive Visualization Brown Fat β burn calories as heat Watch brown-fat mitochondria leak their proton gradient through UCP1 to make pure heat instead of adenosine triphosphate (ATP) β the uncoupling trick cold switches on, and the dangerous one a banned diet drug forced. Launch → Interactive Visualization The Menstrual Cycle β run the 28-day hormone loop Run the loop of follicle-stimulating hormone (FSH), luteinizing hormone (LH), estrogen and progesterone β watch a follicle ripen, the luteinizing hormone surge burst the egg, and the lining build and shed β then see how the pill switches the loop off. Launch → Interactive Visualization Lactation & Let-Down β make milk and release it Watch a baby's suckling release two hormones β prolactin to make the milk and oxytocin to squeeze it down in the let-down reflex β then add stress and see the adrenaline shut the let-down off. Launch →
Key Research Papers
Foundational and recent peer-reviewed publications across the major endocrinology subspecialties — diabetes, thyroid, adrenal, pituitary, reproductive endocrinology, and metabolic syndrome. Each citation links to the full text via DOI.
- The Diabetes Control and Complications Trial Research Group. The Effect of Intensive Treatment of Diabetes on the Development and Progression of Long-Term Complications in Insulin-Dependent Diabetes Mellitus (DCCT). New England Journal of Medicine. 1993;329(14):977–986. — doi:10.1056/NEJM199309303291401
- UK Prospective Diabetes Study (UKPDS) Group. Intensive Blood-Glucose Control with Sulphonylureas or Insulin Compared with Conventional Treatment and Risk of Complications in Patients with Type 2 Diabetes (UKPDS 33). Lancet. 1998;352(9131):837–853. — doi:10.1016/S0140-6736(98)07019-6
- Zinman B, Wanner C, Lachin JM, et al. Empagliflozin, Cardiovascular Outcomes, and Mortality in Type 2 Diabetes (EMPA-REG OUTCOME). New England Journal of Medicine. 2015;373(22):2117–2128. — doi:10.1056/NEJMoa1504720
- Marso SP, Daniels GH, Brown-Frandsen K, et al. Liraglutide and Cardiovascular Outcomes in Type 2 Diabetes (LEADER). New England Journal of Medicine. 2016;375(4):311–322. — doi:10.1056/NEJMoa1603827
- American Diabetes Association Professional Practice Committee. Standards of Care in Diabetes—2024. Diabetes Care. 2024;47(Suppl 1):S1–S321. — doi:10.2337/dc24-Sint
- Jonklaas J, Bianco AC, Bauer AJ, et al. Guidelines for the Treatment of Hypothyroidism (American Thyroid Association). Thyroid. 2014;24(12):1670–1751. — doi:10.1089/thy.2014.0028
- Bornstein SR, Allolio B, Arlt W, et al. Diagnosis and Treatment of Primary Adrenal Insufficiency: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism. 2016;101(2):364–389. — doi:10.1210/jc.2015-1710
- Nieman LK, Biller BMK, Findling JW, et al. The Diagnosis of Cushing's Syndrome: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism. 2008;93(5):1526–1540. — doi:10.1210/jc.2008-0125
- Stewart PM, Biller BMK, Marelli C, Gunnarsson C, Ryan MP, Johannsson G. Exploring Inpatient Hospitalizations and Morbidity in Patients with Adrenal Insufficiency. Journal of Clinical Endocrinology & Metabolism. 2016;101(12):4843–4850. — doi:10.1210/jc.2016-2221
- Reaven GM. Banting Lecture 1988. Role of Insulin Resistance in Human Disease. Diabetes. 1988;37(12):1595–1607. — doi:10.2337/diab.37.12.1595
- Matthews DR, Hosker JP, Rudenski AS, Naylor BA, Treacher DF, Turner RC. Homeostasis Model Assessment: Insulin Resistance and Beta-Cell Function from Fasting Plasma Glucose and Insulin Concentrations in Man (HOMA-IR). Diabetologia. 1985;28(7):412–419. — doi:10.1007/BF00280883
- Action to Control Cardiovascular Risk in Diabetes Study Group. Effects of Intensive Glucose Lowering in Type 2 Diabetes (ACCORD). New England Journal of Medicine. 2008;358(24):2545–2559. — doi:10.1056/NEJMoa0802743
- Rotterdam ESHRE/ASRM-Sponsored PCOS Consensus Workshop Group. Revised 2003 Consensus on Diagnostic Criteria and Long-Term Health Risks Related to Polycystic Ovary Syndrome (PCOS). Human Reproduction. 2004;19(1):41–47. — doi:10.1093/humrep/deh098
- Ross DS, Burch HB, Cooper DS, et al. 2016 American Thyroid Association Guidelines for Diagnosis and Management of Hyperthyroidism and Other Causes of Thyrotoxicosis. Thyroid. 2016;26(10):1343–1421. — doi:10.1089/thy.2016.0229
- Bakris GL, Agarwal R, Anker SD, et al. Effect of Finerenone on Chronic Kidney Disease Outcomes in Type 2 Diabetes (FIDELIO-DKD). New England Journal of Medicine. 2020;383(23):2219–2229. — doi:10.1056/NEJMoa2025845
- Frías JP, Davies MJ, Rosenstock J, et al. Tirzepatide versus Semaglutide Once Weekly in Patients with Type 2 Diabetes (SURPASS-2). New England Journal of Medicine. 2021;385(6):503–515. — doi:10.1056/NEJMoa2107519
PubMed Topic Searches
Live PubMed queries that update as new papers are indexed.
- PubMed: endocrine disease review
- PubMed: diabetes mellitus type 2
- PubMed: thyroid disease
- PubMed: adrenal insufficiency
- PubMed: Cushing syndrome
- PubMed: hyperparathyroidism
- PubMed: pheochromocytoma
- PubMed: polycystic ovary syndrome
- PubMed: metabolic syndrome
- PubMed: obesity endocrinology
- PubMed: pituitary disorders
- PubMed: insulin resistance
Connections
- All Conditions
- How Breast Milk Is Made: Prolactin & the Let-Down Reflex — interactive animation
- The Menstrual Cycle: Four Hormones in a Loop — interactive animation
- Brown Fat: How You Burn Calories as Heat — interactive animation
- Glucagon-Like Peptide-1, Incretins & the New Weight-Loss Drugs — interactive animation
- Endocrinology Index
- Diabetes
- Insulin Resistance
- Metabolic Syndrome
- Obesity
- Thyroid Disorders
- Hashimoto's Thyroiditis
- Graves' Disease
- Hypothyroidism
- Hyperthyroidism
- Lab Tests
- Vitamin D
- Magnesium
- Chromium
- Theodor Kocher (Nobel 1909) — the site’s thyroid reference: iodine deficiency and excess, reading thyroid results, and the nodule-overdiagnosis problem
- Herbs covered on this site that discuss conditions in this specialty: Moringa · Olive Leaf (Olea europaea) · Aloe Vera · Curry Leaf (Murraya koenigii) · Jewel Vine (Derris elliptica) · Marjoram
All Endocrinology Articles A–Z
Every article in this specialty, listed alphabetically.
- Acromegaly
- Addison's Disease
- Adrenal Fatigue (Hypothalamic-Pituitary-Adrenal Axis Dysfunction)
- Adrenal Incidentaloma
- Adrenal Insufficiency
- Carcinoid Tumor
- Congenital Adrenal Hyperplasia
- Cushing's Syndrome
- Diabetes Disease
- Diabetes Insipidus
- Gestational Diabetes
- Glucagonoma β Pancreatic Alpha-Cell Tumor
- Goiter
- Graves’ Disease: The Most Common Cause of Hyperthyroidism
- Gynecomastia
- Hashimoto's Thyroiditis: The Most Common Cause of Hypothyroidism in the Developed World
- Hyperparathyroidism
- Hyperthyroidism
- Hypoparathyroidism
- Hypopituitarism
- Hypothyroidism
- Insulin Resistance: The Silent Upstream Driver of Chronic Disease
- Insulinoma β Pancreatic Beta-Cell Tumor
- Male Hypogonadism
- Metabolic Syndrome
- Multiple Endocrine Neoplasia
- Multiple Endocrine Neoplasia Type 1 (MEN1)
- Multiple Endocrine Neoplasia Type 2 (MEN2)
- Obesity
- Paraganglioma
- Polycystic Ovary Syndrome
- Pheochromocytoma
- Prediabetes
- Premature Ovarian Insufficiency
- Primary Hyperaldosteronism
- Primary Hyperparathyroidism
- Prolactinoma
- Secondary Hyperparathyroidism
- SIADH β Syndrome of Inappropriate Antidiuretic Hormone
- Subclinical Hypothyroidism
- Thyroid Cancer
- Thyroid Disorders
- Thyroid Nodules
- Thyroid Storm
- Type 1 Diabetes
- Type 2 Diabetes
- Zollinger-Ellison Syndrome (Gastrinoma)