TY - CHAP M1 - Book, Section TI - Dry Skin A1 - Baumann, Leslie S. A2 - Baumann, Leslie S. A2 - Rieder, Evan A. A2 - Sun, Mary D. PY - 2022 T2 - Baumann’s Cosmetic Dermatology, 3e AB - SUMMARY POINTSWhat’s Important?The water content of the SC should be greater than 10%.The formation of fine wrinkles is associated with low water content in the skin.Increasing water consumption will increase the water content of skin, especially in those who consume less than 2,500 mL/day of water.The microbiome affects skin hydration and skin hydration affects the microbiome.Relative humidity below 30% can lead to dry skin unless the patient has high levels of sebum production. The optimal relative humidity for skin hydration is 60%.Increased humidity increases skin elasticity.An elevated pH impairs barrier homeostasis and SC cohesion, decreasing skin protection from the environment.What’s New?Cell phone-attached devices to measure skin hydration are inaccurate due to humidity and ambient air flow.Use of moisturizers in newborns decreases the development of atopic dermatitis, food allergies, and asthma.What’s Coming?The effects of cannabinoids on the skin barrier and skin hydration are unclear. SN - PB - McGraw Hill LLC CY - New York, NY Y2 - 2024/03/28 UR - dermatology.mhmedical.com/content.aspx?aid=1190668141 ER -