What does the acidic pH of sweat help to prevent?

The acidic pH of sweat plays a crucial role in protecting the skin from microbial invasion. The normal pH of human skin is slightly acidic, ranging between 4.5 to 5.5, which creates an unfavorable environment for many bacteria and pathogens. This acidity helps to inhibit the growth of harmful microorganisms that can cause infections. The skin’s natural flora, which includes beneficial bacteria, can thrive in this mildly acidic environment while potentially pathogenic bacteria are kept in check.

This characteristic is part of the skin's innate defense system, which is vital for maintaining overall skin health and preventing infections. By ensuring conditions are less hospitable for harmful microbes, the acidic pH of sweat significantly contributes to the prevention of bacterial growth on the skin's surface.