There are four product variations, with three available in the US today. RHA 2 is used to treat lips, the eyelid area, and superficial lines and wrinkles. RHA 3 is used for deeper nasolabial folds and marionette lines, as well as cheeks. RHA 4 is used for cheeks, the chin, jawline, and temples. The products can be used across the face, including the nasolabial folds, the under eyes, and more.