pH Balance
Definition
pH (potential of hydrogen) is a measure of acidity or alkalinity on a scale of 0 to 14, with 7 being neutral. Healthy skin has a slightly acidic pH of approximately 4.5 to 5.5, often referred to as the 'acid mantle.' This mildly acidic environment is crucial for maintaining barrier function, supporting the skin microbiome, enabling proper enzyme activity for desquamation, and protecting against harmful bacteria and other pathogens. When the skin's pH is disrupted — by alkaline cleansers (like traditional bar soaps with pH 9-10), hard water, or over-exfoliation — the barrier becomes compromised, leading to dryness, irritation, increased sensitivity, and vulnerability to infection and breakouts. Choosing pH-balanced skincare products (those formulated near pH 5.5) helps maintain the skin's natural acid mantle. Active ingredients like AHAs and BHAs require specific pH ranges to be effective.
Was this definition helpful?