Having frizzy hair only becomes useful when trying to find storage space for stray crayons or while performing impersonations of tumbleweeds. Straighten out strands with today's Groupon: for $179, you get a Cadiveu Brazilian blowout or a keratin smoothing treatment at Patrick Evan Salon (a $375 value).

Patrick Evan Salon's cast of hairstylists, described as "welcoming" and "responsive" by Examiner.com, unleashes their strand-straightening expertise on frazzled head threads during Brazilian Blowouts and keratin smoothing treatments that restore shine and moisture to lackluster locks. After surveying the coiffure's texture, volume, and quantity of snakes, a seasoned stylist determines which formula best suits the client's desired results—the Brazilian Blowout uses the formic acid-based Cadiveu and the smoothing treatment uses Coppola Keratin Complex. Over the course of 90 minutes to three hours, the hair humanitarian coats each strand with a nutrient-rich protein that fuses into coiffures with a brief blow-dry and iron. Both hair-smoothing treatments can yield a number of beautifying results that last up to three months, such as reduced frizz and damage from excessive heat styling.

To ensure the safety of clients and stylists during the treatment, each of Patrick Evan Salon's stations come furnished with source capture air filtration systems that suck away fumes, chemicals, or lingering thought bubbles. The salon also employs a portable formaldehyde detection meter to ensure they are complying with current OSHA standards.

Some hair-straightening products that claim to be formaldehyde-free include aldehyde compounds, which are similar to the carcinogen formaldehyde. Side effects may include nosebleeds, headaches, vomiting, and respiratory problems, among others. Learn more about the health risks here.