We don’t know too many people that are using their hair straighteners vertically, but there must be a few since ISA has made a point of clarifying that this model is intended only to be used horizontally, i.e., perpendicular to your hair. According to the manufacturer, using the hair straightener horizontally reduces hair pulling for a more comfortable experience. This may be particularly important to you if your hair tends to knot easily or you have unruly curls and texture.
The digital interface accurately displays the fully adjustable temperature setting from 170 degrees to 450 degrees Fahrenheit, providing optimal performance for any hair type. The floating plates with curved edges continuously adjust the tension and angle of the plates to avoid snagging your hair so that you have full flexibility when creating sleek, wavy or curly styles.
We loved the Bio Ionic’s user-friendly design. Two of our favorite features are its bright digital temperature control and the instructions stamped directly onto the tool. It also feels natural in the hand, and its matte finish provides a slight grippiness, but doesn’t pull at the hair when styling. Plus, the tool sports a uniquely shaped plate that’s curved at the tip and makes it really easy to get close to the scalp. One tester who is new to using flat irons said the Bio Ionic felt intuitive and even encouraged her to try harder styles, like creating curls and waves.
This durable KIPOZI flat iron can be set anywhere between 170 and 450 degrees to suit any kind of thickness or texture, and its curved plate design makes it great for giving your hair some texture. The Nano-Titanium plates heat up quickly and lock in moisture, so hair looks hydrated, healthy, and sleek. It’s also got a compatible voltage for anywhere in the world.
It has settings for different amounts of heat needed to straighten various types of hair. You should not use the highest setting unless your hair is very unruly with lost of natural oil. It is a well known fact that some straighteners can leave your hair hard and flat. This will never happen with model. Your hair will not get “cooked” even with daily use.
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.”

So there you have it, our experts here at Respectable Reviews picks for the top hair straightener for natural hair, as well as some of our best tips for straightening natural hair without causing damage. While there are so many different types of hair straighteners out there, you can rest confident in knowing that if you’re picking one of the flat irons that our experts selected, you are treating your hair (and your confidence) to the best flat iron for natural hair out there.


The HSI 1st Gen Professional Ceramic Flat Iron is designed with tourmaline-infused ceramic plates, generating negative ions and allowing smaller water molecules to penetrate into the hair shaft to reduce frizz and static. Built for durability and lasting results, the floating plates give the flexibility to flip, curl or straighten your hair – all with a single iron.
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.
“I’m in ‘ahhh’ at how awesome of a straightener this is. If you ask me, it’s a lot better than the high-end brands. It leaves my hair silky-smooth and shiny. I absolutely love its features, and you can watch the heat meter rise as it’s heating up. To me, five stars is not enough to rate this product. It’s definitely worth the money. I’m in love with this straightener. Also, the lock on it I found to be a awesome bonus.”
Heat stylers, such as flat irons, get a bad rap for singeing hair beyond repair, but that doesn't have to be the case. The key to preserving your hair's health while using these hot tools is passing a quality straightener over heat-protected strands without letting the heat sit on one spot too long. Speaking of stellar straighteners, here are 11 of our top picks, ya know, if you're looking to upgrade yours.
At first, the Bio Ionic 10X Pro Styling Iron’s vibrating plates seemed gimmicky. But we were surprised at how effective they were when styling our hair. Our testers found the vibrating plates made straightening their hair go faster with virtually zero snagging. Engaging the vibration was also simple — click the power button and tap the plates together and you’re ready to go.

If you want to achieve sleek, pin-straight hair, a high-quality hair straightener should be in your beauty arsenal. A hair straightener, also known as a flat iron, smooths the follicle of your hair between two heated plates. Some hair straighteners can even do double duty, creating loose waves and curls without the frizz. So how to choose the best hair straightener for you, and get those shampoo commercial-worthy locks? There are several things to consider to make sure you'll get the best style result, but the most important is hair type.
If you're still not convinced, then ask yourself a question. Ask yourself how serious you are about your lifting. Decide for yourself, right here and right now, whether you're the kind of lifter GRAY HAIR AND BLACK IRON was written for. If you're not, that's fine. No hard feelings. I said at the beginning that GRAY HAIR AND BLACK IRON was written for a very small, very elite group of men and women. It's not mass-market stuff, and it's not for everyone. It's for deeply committed, deeply serious Iron Warriors - warriors who've been battling the iron for a very long time - and who intend to keep on fighting the fight for many years to come. So if that's NOT who you are, don't order the book.

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If you are interested in adding the benefits of keratin use into other aspects of your hair care routine, treat yourself to a keratin-rich hair mask once per week! There are dozens of fantastic keratin masks on the market to choose from (and even in your local drugstore!), but we love Naat’s Brazilian Keratin Intensive Hair Mask (which you can buy here from Amazon) for a consistent shine every time!
Available with either ceramic plates (good for all hair types) or titanium ones (choice for curly, thick, and coarse textures), this innovative styler features touch sensor technology that lowers the heat when it's not being used, then automatically brings it back up to temp as soon as it's touched. Translation: No more waiting for your iron to heat up in between passes. Use it for smooth and sleek styles, or take advantage of the round brush-esque attachments to create more of a bouncy blowout effect.
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