Which two secretions produce the acid mantle of the skin?

The acid mantle of the skin is primarily formed by sebum and sweat. Sebum, which is produced by sebaceous glands, is an oily substance that helps to keep the skin moisturized and also plays a key role in maintaining the skin's pH balance. Sweat, generated by sweat glands, contains lactic acid and other electrolytes, which contribute to the acidic environment on the surface of the skin.

This acidic environment is important because it serves as a barrier to protect the skin from harmful microorganisms, pathogens, and environmental pollutants while also preserving skin hydration. The synergistic action of sebum and sweat helps ensure that the acid mantle remains effective in performing its protective function. Understanding the roles of these two secretions is crucial for maintaining healthy skin and recognizing how various factors, such as temperature and humidity, can affect this natural barrier.