Health Information
Educational guides to help you understand your health metrics
Body Metrics
A Complete Guide to Body Metrics: Understanding the Numbers Behind Your Health
Learn about key body metrics including BMI, body fat percentage, waist-to-hip ratio, body surface area, and basal metabolic rate. Understand what these measurements mean and how they are used in clinical practice.
BMI vs Body Fat Calculator: Which Should You Use?
BMI vs body fat percentage: what each measures, why BMI can't tell fat from muscle, and when to use one, the other, or both for a health check.
What Is a Healthy BMI Range?
Learn about healthy BMI ranges for adults, what BMI categories mean, and the limitations of using BMI as a health indicator.
Nutrition
A Complete Guide to Nutrition: Understanding Macronutrients, Calories, and Dietary Needs Across Life
Comprehensive guide to nutrition science covering macronutrients, caloric needs, hydration, glycemic index, pregnancy nutrition, and pediatric growth. Evidence-based information for making informed dietary choices.
Nutrition Calculators for Weight Management: Your Complete Guide (2026)
Master the BMI → Ideal Weight → TDEE → Macros workflow for effective weight management. Learn cutting vs bulking strategies, protein requirements, and how to use nutrition calculators together for sustainable results.
How Many Calories to Lose a Pound? The 3,500 Rule and What Actually Happens
About 3,500 calories is the usual answer, so a 500-calorie daily deficit is often said to take off a pound a week. Where that number comes from, why it overestimates loss over months, and how to plan a realistic deficit.
Understanding TDEE and Metabolism
Learn how your body burns calories, what Total Daily Energy Expenditure (TDEE) means, and how to use it for weight management.
Clinical
A Complete Guide to Clinical Laboratory Medicine: Understanding Key Tests and Calculations
Comprehensive guide to clinical laboratory medicine covering kidney function tests (eGFR, creatinine clearance), liver scoring systems (MELD, Child-Pugh), acid-base balance, electrolyte corrections, and cardiovascular monitoring.
Electrolyte Disorders Guide: Sodium, Potassium, Calcium, and Anion Gap
Practical guide to hyponatremia, hyperkalemia, calcium disorders, and anion gap metabolic acidosis with treatment-oriented calculator workflows.
eGFR vs Creatinine Clearance: Key Differences for CKD and Medication Dosing
eGFR vs creatinine clearance: why eGFR is used to stage CKD while CrCl (Cockcroft-Gault) guides drug dosing, and how the units and formulas differ.
Understanding Liver Function Tests
Learn what liver function tests measure, what the key markers mean, and how clinical scoring systems assess liver disease severity.
Cardiology
A Complete Guide to Cardiology: Risk Scores, Heart Failure, and Cardiovascular Disease Management
Comprehensive guide to cardiology covering cardiovascular risk assessment, atrial fibrillation management, acute coronary syndromes, heart failure classification, lipid management, and blood pressure monitoring. Learn about key clinical scores and tools.
Cardiovascular Risk Assessment: ASCVD, Framingham, and Statin Therapy Explained
In-depth comparison of cardiovascular risk calculators including the 2013 ACC/AHA Pooled Cohort Equations (ASCVD), Framingham Risk Score, and Reynolds Risk Score. Covers 10-year risk interpretation, statin therapy thresholds, risk enhancers, and when each calculator applies.
Blood Pressure Categories and What They Mean
Understand blood pressure categories from normal to hypertensive crisis, learn about risk factors, and find out when to seek medical attention.
Framingham vs ASCVD vs Reynolds: Heart Risk Calculators Compared
Framingham, ASCVD (Pooled Cohort Equations) and Reynolds risk scores compared, plus the 2026 US guideline move to the PREVENT equations.
Emergency
A Complete Guide to Emergency Medicine: Decision Tools, Scoring Systems, and Clinical Protocols
Comprehensive guide to emergency medicine decision-making tools including Wells criteria for DVT and PE, CURB-65, Glasgow Coma Scale, sepsis scores (qSOFA, SOFA, SIRS), trauma assessment, Parkland formula for burns, and cervical spine clearance rules.
Emergency Medicine Calculator Guide: Wells, PERC, CURB-65, qSOFA, SOFA
Use the right ED decision tool faster: Wells/PERC for PE-DVT, CURB-65 for pneumonia, and qSOFA-SOFA for sepsis triage and escalation.
ICU Scoring Systems Explained: SOFA, APACHE II, MELD, and Critical Care Prognostication
Comprehensive guide to intensive care unit scoring systems including SOFA, APACHE II, MELD, Child-Pugh, Glasgow Coma Scale, qSOFA, and SIRS. Learn when to use each score, how they predict mortality, and their role in critical care decision-making and goals of care discussions.
CURB-65 vs PSI: Choosing the Right Pneumonia Severity Score
Compare CURB-65 and PSI for CAP triage, admission decisions, and safe discharge planning in ED and outpatient settings.
SOFA vs APACHE II: Which ICU Score to Use and When
Side-by-side ICU score comparison for sepsis and critical care: when to use SOFA for daily trends versus APACHE II for admission mortality risk.
Wells DVT vs Wells PE: Which Score to Use for Suspected VTE
Practical Wells score comparison: when to use Wells DVT versus Wells PE, how PERC fits in, and the next diagnostic step for clot evaluation.
Obstetrics
A Complete Guide to Obstetrics: Reproductive Health, Pregnancy, and Newborn Assessment
Comprehensive guide to obstetric care covering menstrual cycle tracking, fertility and conception, pregnancy dating, fetal development monitoring, cervical assessment with the Bishop score, newborn Apgar scoring, and labor monitoring.
Pregnancy Calculators: Complete Guide for Expectant Mothers (2026)
Your comprehensive guide to pregnancy calculators - from due date and gestational age to fetal weight and labor tracking. Learn which calculator to use at every stage of pregnancy.
Pregnancy Milestones: A Trimester-by-Trimester Guide
Follow key pregnancy milestones from the first trimester through delivery, including fetal development, important tests, and what to expect.
Pharmacy
Endocrinology
Complete Guide to Thyroid Conditions: Hypothyroidism, Hyperthyroidism, and Thyroid Nodules
Deep-dive guide covering thyroid function, TSH interpretation, hypothyroidism (Hashimoto's), hyperthyroidism (Graves' disease), thyroid nodules, thyroid cancer screening, pregnancy considerations, and levothyroxine dosing.
Diabetes Management Guide: Type 1, Type 2, DKA, and HbA1c Monitoring
Comprehensive guide to diabetes mellitus covering Type 1 vs Type 2 pathophysiology, HbA1c interpretation and targets, DKA and HHS recognition and management, insulin strategies, GLP-1/SGLT2 inhibitors, and long-term complication prevention.
Endocrinology Guide: Diabetes, Thyroid Disorders, and Hormone Management
A comprehensive guide to endocrine system fundamentals including diabetes management, HbA1c interpretation, insulin dosing, thyroid disorders, TSH evaluation, levothyroxine therapy, and corticosteroid equivalency.
Neurology
Neurology Guide: Stroke Assessment, Brain Injury Grading, and Neurological Emergencies
A comprehensive guide to neurological assessment including stroke types, the NIH Stroke Scale, TIA risk stratification with ABCD2, subarachnoid hemorrhage grading, and recognizing neurological emergencies.
Stroke Warning Signs and Risk Assessment
Learn to recognize stroke symptoms using the FAST method, understand risk factors, and discover how clinical tools assess stroke severity and TIA risk.
Fitness
Mental Health
Mental Health Screening Guide: Depression, Anxiety, Substance Use, and Cognitive Assessment
A comprehensive guide to mental health screening tools including PHQ-9, GAD-7, AUDIT, CAGE, EPDS, PCL-5, C-SSRS, MoCA, and MMSE. Learn how these assessments work, what the scores mean, and when to seek professional help.
Mental Health Screening Tools: PHQ-9, GAD-7, and Beyond (2026)
Complete guide to depression and anxiety screening tools - PHQ-9, GAD-7, PHQ-2, GAD-2, and specialized assessments for PTSD, alcohol use, and postpartum depression. Learn when to use each screening tool and when to seek professional help.
PHQ-9 vs GAD-7: Depression vs Anxiety Screening Explained
Compare PHQ-9 (depression screening) and GAD-7 (anxiety screening). Learn when to use each tool, scoring differences, and why many professionals recommend using both together.
Dermatology
Geriatrics
Pediatrics
Infectious Disease
Pulmonology
Nephrology
A Comprehensive Guide to Nephrology: Kidney Assessment Tools and Renal Health
Learn about kidney function including acute kidney injury evaluation with FENa and BUN/Cr ratio, chronic kidney disease staging, fluid and electrolyte balance, free water deficit, urine studies interpretation, and dialysis basics.
Kidney Function Numbers Explained: eGFR, Creatinine, CKD Stages, and Drug Dosing
Understand eGFR and creatinine results, CKD stage cutoffs, and when to use eGFR vs creatinine clearance for safer medication dosing.
Orthopedics
Urology
Gastroenterology
A Complete Guide to Gastroenterology and Digestive Health
Comprehensive guide to digestive system conditions including upper GI bleeding, GERD, peptic ulcer disease, inflammatory bowel disease, liver disease, and GI cancer screening, with explanations of the Rockall and Glasgow-Blatchford scoring tools.
Complete Guide to Liver Disease: Cirrhosis, Portal Hypertension, and Scoring Systems
Comprehensive guide to liver disease including NAFLD/NASH, alcoholic liver disease, viral hepatitis, cirrhosis pathophysiology, portal hypertension complications (varices, ascites, HRS), Child-Pugh score, MELD score, FIB-4, APRI, and liver transplant criteria.
Hematology
A Complete Guide to Hematology and Blood Disorder Assessment
Comprehensive guide to hematological conditions including heparin-induced thrombocytopenia, venous thromboembolism, anemia, coagulopathies, and anticoagulation therapy, with explanations of the 4T score and Wells DVT scoring tools.
Complete Guide to Anemia: Causes, Types, and Diagnosis
Comprehensive guide to anemia including iron deficiency, vitamin B12 and folate deficiency, hemolytic and aplastic anemia, CBC interpretation, MCV classification, symptoms, diagnosis, and treatment, with clinical context for blood count tools.