The Bio Ionic worked well on all of our testers’ hair, but it’s best on drier hair with a medium thickness. We spritzed testers’ hair with some keratin smoothing treatment, but the Bio Ionic did a lot of the heavy lifting to make our hair feel softer. The tool gets hot, but not too hot to grip, and it excels at creating the silky volume you want without making your hair pin-straight and flat. One tester put it perfectly: “[The Bio Ionic] is the Rumplestiltskin of hair straighteners. It’s turning straw into gold.”
You do not have to use a blow dryer. In fact, I recommend not using one at all, as it could save extra damage to your hair and the extra heat isn't needed. After a shower, you could put your damp hair in a braid, let it dry in the braid, and when you want to straighten, your hair won't be as puffy or frizzy. That ultimately leads to straight, sleek hair.
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While there are a lot of great options to choose from, our all-around top pick is the LumaBella Keratin Duel Touch Hair Straightener. Featuring unique, keratin-infused plates for optimal shine and less damage, the LumaBella Keratin Duel Touch Hair Straightener proves that technology really can make a difference when it comes to hair care! We also love this model’s innovative smart heat sensors that protect hair from heat damage and lock in moisture.

It is packed with the most advanced technology to give you shinier, smoother results that lasts longer. The one-inch wide heating plates are made of high quality, durable ceramic that provides an ultra smooth surface so that you’re hair glides through. The ceramic plates are then coated with tourmaline gemstones that emit negative ions to give you a frizz-free shine.


You do not have to use a blow dryer. In fact, I recommend not using one at all, as it could save extra damage to your hair and the extra heat isn't needed. After a shower, you could put your damp hair in a braid, let it dry in the braid, and when you want to straighten, your hair won't be as puffy or frizzy. That ultimately leads to straight, sleek hair.
Eight embedded sensors regulate and evenly distribute the heat on this ceramic iron, minimizing damage and increasing shine and smoothness. With adjustable temperature settings that go as low as 140 degrees (the coolest we've ever seen), it's ideal for anyone with super fine hair, or to smooth out the tiny frizzies around your hairline. It also comes with a lifetime warranty, which is never a bad thing.
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