Does hair Botox thicken hair?

If your hair’s been feeling a bit limp, lifeless or thinner than you’d like, you’ve probably come across something called hair Botox. It’s one of those salon treatments people whisper about like it’s magic—but does it actually thicken your hair? Or is it just another treatment that sounds fancier than it really is?

Let’s clear things up. Here’s everything you need to know about what hair Botox does, how it works, and whether it really gives you that full-bodied, thicker-looking hair you’ve been hoping for. And if you’re still unsure? Your Solihull Hairdresser will help you decide if it’s the right fit for your hair goals.

What actually is hair Botox?

Despite the name, it’s got nothing to do with needles or freezing anything. Hair Botox is a deep conditioning treatment designed to repair, smooth, and strengthen the hair from the inside out. It fills in gaps in the hair shaft with proteins like keratin, collagen, and amino acids, leaving your strands stronger, shinier and much healthier-looking.

It’s especially popular with people whose hair has been through a bit of a rough patch—think over-bleaching, excessive heat styling, or long-term dryness. The treatment works by coating the hair in these nourishing ingredients and sealing them in with heat. Once it’s done, your hair feels softer, smoother, and noticeably easier to manage.

Does it actually make your hair thicker?

Here’s the truth: hair Botox won’t grow new hair or increase how many strands you’ve got. But it can make your hair feel and look thicker.

The reason is simple. When your hair is damaged or dehydrated, the cuticle (that’s the outer layer) becomes rough and uneven. That gives hair a thinner, frizzier appearance. By filling in those rough areas, Botox creates a smoother surface and makes each strand plumper. The result? Hair that looks fuller and feels far stronger.

So while you’re not changing the number of hairs on your head, you’re improving the condition of the hair you do have—and that makes a big difference.

Who is it best for?

Hair Botox is perfect if your hair feels fragile, especially if it’s become thinner due to breakage. If you’ve been highlighting for years or your hair’s been snapping off from straighteners, it can be a bit of a miracle treatment.

It’s also brilliant for naturally fine hair that struggles to hold onto moisture or volume. That said, it’s not a one-size-fits-all solution. If your hair’s already in good condition and your issue is more about hair loss than texture, there may be better options to look into.

Your hairdresser in Solihull can take a proper look at your hair and let you know if Botox is the best choice, or whether something else would be more effective.

How long does it last?

Most people find that the effects of hair Botox last between eight and twelve weeks, depending on how often you wash your hair and what products you use at home. Sulphate-free shampoos are your best friend here—they help the treatment stay locked in for as long as possible.

You’ll usually notice the difference straight away. Hair will feel silkier, sit flatter, and you’ll likely need to spend less time styling it. But the key is maintenance. While it’s not permanent, getting regular Botox treatments can help build up the strength of your hair over time, especially if you treat it kindly between visits.

For the best Solihull hairdresser, look no further than Salon No. 100! We’ve gathered hundreds of five-star reviews over the past few years. Call 07966 105306 and book your appointment today!