Detergent-induced epidermal barrier dysfunction and its prevention

Area of Science:

• Dermatology
• Cosmetic Science
• Biochemistry

Background:

• Skin cleansing products, while necessary for hygiene, can remove vital skin lipids.
• This removal disrupts the epidermal barrier function, leading to increased transepidermal water loss (TEWL) and permeability.
• Detergent-induced skin barrier disruption poses a significant challenge for maintaining skin health.

Purpose of the Study:

• To investigate the efficacy of various lipid supplements in reversing detergent-induced skin barrier disruption.
• To identify which lipid supplements are most effective in preventing and recovering from barrier damage.
• To evaluate the potential of pseudo-ceramide (Cer2) as a preventative ingredient in skin cleansers.

Main Methods:

• Skin barrier function was assessed by measuring transepidermal water loss (TEWL) and riboflavin penetration.
• Rat and human skin models were treated with 5% sodium lauryl sulfate (SLS) to induce barrier disruption.
• Lipid supplements including monoglyceride (MG), squalene (SQ), cholesterol ester (CE), and pseudo-ceramide (Cer2) were tested for their protective and restorative effects.

Main Results:

• Supplementation with MG, SQ, CE, and Cer2 reversed the elevated TEWL and riboflavin penetration caused by SLS.
• Monoglyceride (MG) and pseudo-ceramide (Cer2) demonstrated the most significant restorative effects.
• MG appeared to inhibit the elution of intercellular ceramides, preserving barrier integrity.
• Topical Cer2 application was less effective for recovery, but Cer2 supplementation in cleansers prevented barrier disruption.

Conclusions:

• Preventing skin barrier disruption is crucial for maintaining skin health.
• Pseudo-ceramide (Cer2)-supplemented skin cleansers are beneficial for conserving skin barrier function.
• Lipid supplementation offers a promising strategy to mitigate the adverse effects of detergents on the skin barrier.