Hair health, like a canary in a coal mine, can indicate dangerous toxins or whether the area is overrun by cats. Foil feline hair-nesters with today's Groupon: for $150, you get a keratin treatment at Elements Salon Spa Retreat in Dyer, Indiana (up to a $300 value).

Stylists at Elements Salon Spa Retreat placate unruly coiffures with treatments designed to fortify each strand against environmental and styling damage. Ravaged manes rediscover their natural pride with a tress-taming keratin treatment, which infuses unruly locks with a vitamin-rich keratin protein that curtails rambunctious curls and evokes the eye-fetching shimmer of a crisco-slathered wookie. Ideal for abolishing frizz and fortifying follicles, keratin treatments envelop hair in a healthy embrace, begetting a style-ready coif that won’t engulf overhead fans. Elements’ stylists tend to tufts with all-natural products, and guests luxuriating in the spa’s soothing environs can satiate their palates with complimentary coffee, tea, wine, and snacks.