What is the function of nonpathogenic bacteria in beauty treatments?

Nonpathogenic bacteria play a beneficial role in beauty treatments by enhancing health. These bacteria are not harmful to humans and can contribute positively to skin health and overall wellness. For instance, certain nonpathogenic bacteria are involved in maintaining the skin's natural flora, which helps protect against harmful pathogens, supports the immune system, and can even aid in the healing process.

This beneficial aspect of nonpathogenic bacteria is significant in dermatological and aesthetic treatments, where maintaining a balanced microbial environment is essential for achieving healthy skin. Some beauty products also utilize nonpathogenic bacteria to promote skin vitality and rejuvenation.

The other options represent functions that nonpathogenic bacteria do not serve. Causing infections is characteristic of pathogenic bacteria, and while they may impact product longevity or add fragrance indirectly through fermentation processes, those are not the primary recognized functions of nonpathogenic bacteria in beauty treatments.