INTRODUCTION
Acne is the most common dermatologic condition. According to the American Academy of Dermatology, acne affects 50 million Americans annually, and 85% of people aged 12 to 24 experience at least minor acne.1 Nearly half of those who suffer with acne in their teens will continue to have persistent acne into their 20s and 30s.2 Additionally, the incidence of late-onset adult acne that occurs after the age of 25 is increasing, particularly in females.3,4
Studies suggest that stress, poor nutrition, lack of sleep, medications, cosmetics, smoking, premenstrual flare-ups, and hormonal disorders play a role in adult acne.5-8 Adult acne affects social and professional life and is associated with low self-esteem, social isolation, and depression.9,10 Accordingly, adult patients with acne are highly motivated and often seek treatment by a dermatologist.
The pathogenesis of acne is multifactorial and includes androgen-driven sebaceous hyperplasia, altered growth and differentiation of follicular keratinocytes, colonization with Cutibacterium acne (C. acnes), and an inappropriate inflammatory response.11 The microcomedone forms because of these processes and is a precursor for all acne lesions. In addition, we know that oxidative stress plays a role in the pathogenesis of acne.12 Local and systemic oxidative stress causes lipid peroxidation, which is an early event that drives the acne process. The spectrum of adult acne includes comedones, inflammatory papules and pustules, and nodules or cysts. Adult acne has a predilection for the lower half of the face in contrast with adolescent acne that is found on the upper central face or so-called "T-zone".13
Studies suggest that stress, poor nutrition, lack of sleep, medications, cosmetics, smoking, premenstrual flare-ups, and hormonal disorders play a role in adult acne.5-8 Adult acne affects social and professional life and is associated with low self-esteem, social isolation, and depression.9,10 Accordingly, adult patients with acne are highly motivated and often seek treatment by a dermatologist.
The pathogenesis of acne is multifactorial and includes androgen-driven sebaceous hyperplasia, altered growth and differentiation of follicular keratinocytes, colonization with Cutibacterium acne (C. acnes), and an inappropriate inflammatory response.11 The microcomedone forms because of these processes and is a precursor for all acne lesions. In addition, we know that oxidative stress plays a role in the pathogenesis of acne.12 Local and systemic oxidative stress causes lipid peroxidation, which is an early event that drives the acne process. The spectrum of adult acne includes comedones, inflammatory papules and pustules, and nodules or cysts. Adult acne has a predilection for the lower half of the face in contrast with adolescent acne that is found on the upper central face or so-called "T-zone".13