An Asian-owned, women-owned keratin-smoothing and extension studio at 902 West University Avenue on the western edge of Hillcrest, The Keratin Shop runs Brazilian and formaldehyde-free smoothing protocols alongside hand-tied and tape-in extension installs. The extension work routes the same technical chair time Green + Anchor Luxury Hair Extensions Salon specializes in a few blocks east. The location puts the studio inside 92103 a short walk from the Washington Street corridor, keeping west-Hillcrest clients out of the Fifth Avenue parking crunch. Color-safe keratin protocols let the team sequence smoothing treatments around balayage maintenance, a scheduling problem Chroma Hair Salon also navigates for its color clients. Extension maintenance appointments and removal-and-reinstall cycles make up the repeat-client book. The highest-effort booking is a full hand-tied extension install paired with a keratin smoothing treatment — a four-to-six-hour chair session that resets both texture and length in one visit.