Best flat irons tested by the Good Housekeeping Research Institute

Good Housekeeping.com
Ion Beauty One Stroke Perpetual Heat Flat Iron

Ion Beauty One Stroke Perpetual Heat Flat Iron

Get sleek hair pronto with one of these smooth operators.

Top Pick

Ion Beauty One Stroke Perpetual Heat Flat Iron ($80, amazon.com via Sally Beauty Supply).

Hair swatches straightened in seconds — and then stayed sleek, even in high humidity, a test where the competition mostly fizzled. It has six heat settings, maxing out at 450°F, and a two-hour auto shutoff.








Bio Ionic OnePass 1" Nano-Ceramic Iron




Splurge-Worthy

Bio Ionic OnePass 1" Nano-Ceramic Iron ($240, amazon.com).

Consumers deemed this tool a standout for completely straightening even thick, wavy, or curly hair. They also liked its silicone strips, which grasped hair without tugging. In the lab, Bio Ionic left strands the smoothest and heated quickly (max temp: 400°F).






Joico K-Pak Protect & Shine Serum
GHRI Tip

To control frizz, apply a GHRI test winner first: Joico K-Pak Protect & Shine Serum (starting at $14 on Yahoo Shopping)

How We Tested

Our beauty lab checked the temperatures of 18 one-inch-wide flat irons, disqualifying any that either never reached their maximum or exceeded it (some did — by 40°F!). Irons that broke when drop-tested also got the boot. We evaluated the remaining 11, straightening frizzy, wavy hair swatches and putting them in a high-humidity, climate-controlled room. Testers also used the irons at home, rating how well they worked.


See more at Good Housekeeping :

Best Anti-Aging Skin Products

Amazing Anti-Aging Products For Your Hair

The Truth Behind 9 Popular Vitamins and Supplements 

*Yahoo Shopping was not compensated by any of the brands listed within this article.

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