A glowing smile charms irritable librarians, stern highway-patrol officers, and judges with highfalutin ideas about driving through the library. Flaunt your beaming beauty with today's Groupon: for $150, you get an in-office Boost teeth-whitening session from Edward Jang, D.D.S. & Associates, with offices in Orinda and Pinole (a $350 value).

Even with 22 years of teeth-tending experience, Dr. Edward Jang continues to attend workshops to keep up with the latest in dental technology. Opalescence Boost whitening rejuvenates less-than-lustrous teeth in just over an hour without the harsh glow of ultraviolet rays. Instead, a dentist-supervised assistant coats chompers with a chemically activated regiment of fluoride and potassium nitrate to beef up enamel strength and bolster oral security against cavities and malicious ex-retainers. Mouth masters freshly mix Boost's bleach for each session, delivering consistent color to each tooth and lightening hues three–six shades in a single visit.