Which of the following is NOT true about acid mantle?

The statement that the acid mantle significantly thickens the skin is not true. The acid mantle is a thin protective layer on the skin's surface composed of sebum and sweat. Its primary functions include maintaining moisture balance, providing a barrier against pathogens, and helping to regulate the skin's pH.

While the acid mantle plays a critical role in protecting the skin's integrity and function, it does not contribute to any significant increases in skin thickness. Skin thickness is primarily determined by factors such as dermatological conditions, skin type, and overall health rather than the presence of the acid mantle. Thus, the correct answer indicates a misunderstanding of the acid mantle's role in skin physiology.