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BIAB nails are a type of manicure you can get at the salon. BIAB is an acronym for the term "builder in a bottle." They are often considered a healthier alternative to gel manicures.

The service menu at a nail salon is bursting with options, and if you don't know what each one is, it can be hard to decide the right manicure type for you. BIAB nails, for example, are a popular manicure style that many salons offer, but not many people know exactly what they are.

BIAB is an acronym for "builder in a bottle." "Hard gel, or most gel, used to come in a pot, and now, it's starting to be sold in a bottle for ease of application," Julie Kandalec, manicurist and owner of Julie K Nail Artelier in New York City, tells POPSUGAR. The formula was originally created by Daisy Kalnina, the CEO and founder of The GelBottle Inc., in 2015, but now, many different brands have their own variations.

Ahead, keep reading to learn more about BIAB nails, whether they're better than a regular gel manicure, and more.

A structured manicure is another name for BIAB nails. "Basically, we're taking the builder-in-a-bottle gel and we're putting it on the nail first under gel polish to give the nail more of a structure," Kandalec says.

The application process for BIAB nails is simple. The bottle formula allows you to paint on the builder gel in the same way that you apply regular nail polish. You can do an overlay of your natural length or, depending on the type and strength of builder gel you use, you can even add length onto nails and create any shape you'd like.

Your gel nail-polish color and nail art then goes on top of the builder-gel layer. "When we're ready to take it off, instead of soaking, [you] file it off so that that clear layer always stays underneath to protect the nail," Kandalec says.

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Because BIAB nails provide a base layer for your gel-polish color, they're actually a bit better for your nails than traditional gel manicures.

"With regular gel polish, we were always putting it on, soaking it off, putting it on, soaking it off," Kandalec says. "What happens with builder-in-a-bottle manicures, or structured manicures, is that this clear, hard-gel layer first protects the nail from the gel polish." This keeps nails from becoming as brittle or weak.

If your nails are short or broken, the builder in a bottle can help repair them and give them a beautiful shape. "If someone has ridges in their nails, it'll smooth all of that out."

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The price of BIAB nails varies by salon, but you can expect to pay anywhere from $35 to $60 for this manicure type — in the same ballpark as the cost of a regular gel manicure.

A BIAB manicure lasts anywhere from two to four weeks, but Kandalec recommends you get them redone around every two to three weeks to keep them looking good and reduce the risk of breakage. When it's time to freshen them up, you can go to the salon to get them refilled just like a regular gel manicure.

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