Marcus Johnson, RN, BSN

Anemia occurs when you don't have enough healthy red blood cells. Learn about the different types, warning signs, diagnostic tests, and treatments that can help restore your energy and health.

Pneumonia is an infection that inflames the air sacs in your lungs. Learn about the different types, symptoms to watch for, when to seek emergency care, and how pneumonia is diagnosed and treated.

Digital eye strain affects 50-90% of computer workers. Learn about causes, the 20-20-20 rule, blue light effects, and practical strategies to protect your eyes during extended screen use.

Long COVID affects an estimated 65 million people worldwide. Learn about the latest research into its causes, from viral persistence to immune dysregulation, and the treatments being tested in clinical trials like NIH RECOVER.

Microplastics have been found in human blood, lungs, and placentas. Learn about sources of exposure, what current research shows about health risks, and practical steps to reduce your exposure.

Rosacea affects 16 million Americans with facial redness, visible blood vessels, and inflammatory bumps. Learn about triggers, skincare routines, prescription treatments, and laser therapy options.

HPV causes 99% of cervical cancers, but vaccination and screening can prevent nearly all cases. Learn about HPV vaccines, screening guidelines, and what abnormal results mean.

Endometriosis affects 1 in 10 women worldwide with an average 7-year diagnostic delay. Learn about symptoms, modern diagnostic approaches, and effective treatments for pain and fertility.

Up to 79% of runners get injured each year. Learn evidence-based prevention strategies for the most common running injuries.

Sciatica causes shooting pain from your lower back down your leg. Learn what triggers it, when to see a doctor, and which treatments actually work.

Are you getting enough protein? Learn the science-backed protein requirements for different life stages, activity levels, and health goals.

The A1C test measures your average blood sugar over 2 to 3 months and is the primary tool for monitoring diabetes management. Learn about normal ranges, target levels, test accuracy, and how to lower your A1C.

Effective blood sugar management is the cornerstone of diabetes care. Learn about glucose targets, monitoring methods including CGMs, dietary strategies, exercise effects, and medication timing to achieve optimal control.

Diabetes complications include heart disease, kidney disease, eye damage, nerve damage, and foot problems. Learn about prevention through glycemic control, screening schedules, and treatments that can slow or stop progression.

There is no single best diabetes diet — the ADA endorses multiple eating patterns including Mediterranean, DASH, and low-carbohydrate approaches. Learn practical strategies for meal planning, carb counting, and food choices.

Diabetes symptoms range from subtle early signs to life-threatening emergencies like diabetic ketoacidosis. Learn to recognize warning signs, understand when to seek emergency care, and why early diagnosis matters.

Diabetic neuropathy affects up to 50 percent of people with diabetes over time. Learn about peripheral, autonomic, and focal neuropathy types, pain management options, and strategies to prevent nerve damage progression.

Gestational diabetes develops during pregnancy and affects up to 10 percent of pregnancies in the US. Learn about screening, blood sugar targets, dietary management, and long-term risks for mother and baby.

Insulin therapy is essential for type 1 diabetes and many people with type 2 diabetes. Learn about insulin types, injection techniques, pump therapy, dosing strategies, and how to manage common challenges like hypoglycemia.

Metformin is the most prescribed diabetes medication worldwide. Learn how it works, proper dosing, common side effects, drug interactions, and why it remains the recommended first-line treatment for type 2 diabetes.

OCD is far more than liking things tidy. Learn about real OCD symptoms, what causes them, and the therapy that helps 60-80% of patients.

Prediabetes means your blood sugar is higher than normal but not yet diabetes. Learn how the Diabetes Prevention Program lifestyle changes can reduce your risk of type 2 diabetes by 58 percent.

Type 1 diabetes is an autoimmune condition requiring lifelong insulin therapy. Learn about causes, symptoms, insulin pump technology, continuous glucose monitoring, and how to prevent life-threatening complications.

Angina is chest pain caused by reduced blood flow to the heart. Learn to distinguish stable from unstable angina, understand treatment options including nitrates and revascularization, and know when to seek emergency care.

Stroke is the fifth leading cause of death in the US and the leading cause of serious long-term disability. Learn to recognize warning signs and the proven strategies to dramatically reduce your risk.

Type 2 diabetes affects how your body uses insulin and blood sugar. Learn about risk factors, early symptoms, medications like metformin and semaglutide, lifestyle changes, and how to prevent complications through evidence-based management strategies.