Final answer:
An astringent is designed to cleanse skin and return oily skin to a normal pH. It helps to remove leftovers after cleansing, reduce oil, and tighten pores, while also balancing the skin's pH.
Step-by-step explanation:
A product that assists in cleansing skin and returns oily skin to a normal pH is called an astringent. An astringent is typically used after cleansing to remove any leftover makeup, reduce oil, and tighten pores, thus making the skin appear smoother. It can also help to restore the skin’s pH balance after cleansing, which is essential for maintaining skin’s natural barrier.
Toners can also serve this purpose for some skin types, but they are usually less harsh than astringents and may contain moisturizing or anti-inflammatory ingredients. Exfoliants, on the other hand, are designed to remove dead skin cells from the surface of the skin rather than adjusting pH levels, and sunscreens are used to protect the skin from harmful UV rays.