Susan Taylor, MD, FAAD

Articles by Susan Taylor, MD, FAAD

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An expert discusses how dermatologists guide patients in selecting sunscreens based on skin type (fair skin, skin of color, sensitive skin), coexisting conditions, and environmental exposure (blue light, heavy sun). They recommend sun protection factor (SPF) levels and key ingredients and address adherence barriers. Beyond sunscreen, protective clothing, antioxidants, and physical blockers help shield against visible light and infrared radiation.

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An expert discusses how UV radiation causes DNA damage, accelerating skin aging and cancer risk. Visible light and infrared radiation induce oxidative stress and hyperpigmentation, especially in darker skin tones. Conventional sunscreens shield against UV radiation but offer limited visible light and infrared protection. Mineral filters (zinc oxide, titanium dioxide) provide broad coverage, while chemical filters (oxybenzone, avobenzone) absorb UV radiation but lack efficacy against visible and infrared radiation.

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An expert discusses how UV radiation makes up about 7% of the sun’s energy and penetrates the skin, causing aging, hyperpigmentation, and inflammation. Visible light and infrared radiation contribute to skin damage, with blue light being more harmful than red light due to its deeper penetration.

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An expert discusses how treatment for alopecia areata begins with topical/intralesional therapies for limited disease and progresses to systemic options for extensive involvement or treatment resistance. Treatment decisions are guided by disease severity, patient age, comorbidities, and treatment goals. FDA-approved systemic agents include ritlecitinib (JAK3/TEC inhibitor) and baricitinib (JAK1/2 inhibitor), which block inflammatory pathways to promote hair regrowth with favorable efficacy, though they require monitoring for potential adverse effects.

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An expert discusses how alopecia areata affects approximately 2% of the population globally, with onset typically in childhood or early adulthood. Patients often present with autoimmune comorbidities (thyroid disorders, vitiligo, atopic dermatitis) and psychological distress. Diagnostic challenges include differentiating from other hair loss conditions and predicting disease course. Treatment difficulties involve unpredictable responses, lack of standardized protocols, and addressing both physical symptoms and psychological impact.

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