Sarah Chen, MPH

Allergies occur when your immune system overreacts to harmless substances. Learn about common allergy types, symptoms, diagnostic tests, and the most effective treatments available today.

Hypothyroidism is an underactive thyroid that affects energy, weight, and mood. Learn about the causes, symptoms, how it is diagnosed with blood tests, and the role of levothyroxine treatment.

Telehealth visits surged 38-fold during COVID-19 and remain a major part of healthcare delivery. Learn about the benefits, limitations, and future of virtual care including AI integration and remote monitoring.

H5N1 bird flu has spread to dairy cattle and caused sporadic human cases. Learn about transmission risks, symptoms, current containment efforts, and what public health officials recommend.

Adults average 2-3 colds per year. Learn evidence-based prevention strategies including hand hygiene, vaccination, zinc, vitamin C, and lifestyle factors that strengthen your immune defenses.

Eczema (atopic dermatitis) affects over 31 million Americans. Learn to recognize symptoms, identify personal triggers, build an effective moisturizing routine, understand when topical corticosteroids are appropriate, and discover newer treatments like dupilumab that are changing outcomes for severe eczema.

GLP-1 receptor agonists like Ozempic (semaglutide) and Mounjaro (tirzepatide) have become the most significant obesity treatment breakthrough in decades. Learn how they work, their benefits and risks, and what the latest clinical trials reveal.

Discover evidence-based tips for better sleep including CBT-I techniques, sleep hygiene practices, and lifestyle changes recommended by the National Sleep Foundation and the American Academy of Sleep Medicine.

Learn which lifestyle habits, nutrients, and practices actually strengthen immune function. Expert-reviewed guide covering vitamin D, zinc, sleep, exercise, and what the NIH and WHO recommend for immune health.

Psoriasis is an immune-mediated skin disease affecting over 8 million Americans. Learn about the different types, how to recognize symptoms, which topical treatments work best, when systemic therapy is needed, and how biologics targeting TNF-alpha, IL-17, and IL-23 are achieving near-complete clearance.

Skin cancer is the most common cancer, but also one of the most preventable. Learn about UV protection, self-exam techniques, ABCDE rule for melanoma detection, and screening guidelines.

Acne affects up to 85% of people between ages 12 and 24. Learn what causes breakouts, which OTC ingredients like benzoyl peroxide and salicylic acid actually work, when to see a dermatologist, and how prescription retinoids and antibiotics can help clear stubborn acne.

Breast cancer screening saves lives through early detection. Learn when to start mammograms, how often to get screened, what different guidelines recommend, and supplemental screening for high-risk women.

Exercise is one of the most effective treatments for depression and anxiety. Learn how physical activity changes your brain and how much you need.

PCOS affects 1 in 10 women of reproductive age. Learn about symptoms including irregular periods, excess androgens, and insulin resistance, plus proven treatments from lifestyle changes to medications.

Omega-3 fatty acids are essential for heart and brain health. Learn the best food sources, supplement guidance, and how much you actually need.

Added sugar is linked to obesity, diabetes, heart disease, and more. Learn how much is safe and practical strategies to cut back.

SAD affects 5% of adults, causing depression during fall and winter. Learn about light therapy, medication, and lifestyle strategies that help.

Bipolar disorder causes extreme mood swings between mania and depression. Learn about types, symptoms, and effective treatments.

Atrial fibrillation is an irregular, often rapid heart rhythm that increases stroke risk fivefold. Learn about symptoms like palpitations and shortness of breath, causes including high blood pressure and heart disease, and treatments including medications and procedures.

Home blood pressure monitoring improves hypertension management and is recommended by all major guidelines. Learn how to choose a monitor, take accurate readings, and interpret your results.

Coronary artery disease is the most common type of heart disease and the leading cause of death in the US. Learn about symptoms like chest pain and shortness of breath, risk factors, diagnostic tests, and treatments including medications, stents, and bypass surgery.

Heart failure means your heart can't pump blood efficiently to meet your body's needs. Learn about symptoms like shortness of breath and swelling, causes including heart attacks and high blood pressure, treatment options, and how to live well with this condition.

Heart palpitations — a racing, fluttering, or pounding heartbeat — are usually harmless but can sometimes signal a serious condition. Learn causes, when to worry, and treatment options.

Heart attack symptoms vary by person and can be subtle, especially in women. Learn to recognize chest pain, shortness of breath, and other warning signs. Acting fast by calling 911 within minutes can prevent heart damage and save lives.

High cholesterol increases your risk of heart disease and stroke but usually has no symptoms. Learn about LDL, HDL, treatment options including statins, lifestyle changes, and how to lower cholesterol naturally through diet and exercise.

High blood pressure affects nearly half of American adults but often has no symptoms. Learn how to recognize, treat, and prevent hypertension to reduce your risk of heart disease, stroke, and other serious complications.