Having frizzy, unkempt hair can make you appear disoriented and unhinged during job interviews, first dates, and shouting matches with the neighbor's bush. Keep it together with today's Groupon: for $125, you get a keratin hair-smoothing treatment at Salon C International (a $250 value).

Salon C International’s experienced hairdressers tame frizzy locks with smoothing keratin treatments. After infusing locks with a fortifying layer of protein, stylists seal in the serum’s strength with high heat, imparting smoothness and manageability onto previously out-of-control coifs. Afterwards, most heads will host shinier, silkier manes that shield up to 95 percent of environmental humidity, silencing hair follicles’ former banshee screams when caught in the rain. Manes can retain their newfound sleekness for up to five months, depending on hair’s texture and density, patrons’ at-home upkeep regimens, and follicles' affinity for electrical sockets.