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Keratin Treatment Reviews: Do They Work and Are They Worth It?

6 reviews readUpdated 2026Summary & sources

Salon keratin smoothing and Brazilian blowouts run roughly $150 to $400 a visit (more like $500 to $600+ for long or dense hair or premium formaldehyde-free formulas) and fade in a few months, so the real question is not just whether they work but whether they are worth repeating. The reviewers below agree it tames frizz and adds shine, but they split hard on damage, formaldehyde safety, and whether cheap at-home kits can match the salon. The one thing none of these videos actually answer is the cost payoff over a year.

By the True Beauty Cost editorial teamUpdated July 6, 2026How we research

Reviews are summarized and linked; each verdict is the creator's own. We are not affiliated with these channels.

The reviewers

What each one concluded

Audrey Victoria: KERATIN TREATMENTS | EXPOSING THE TRUTH ABOUT BRAZILIAN KERATIN12:35
Skip itLong-term user who documented her results
Audrey Victoria

530K views

She loved the initial smoothness but came to see the treatment as a mistake, tying it to weakened hair and shedding, and she would not keep repeating it.

She spends most of the video on whether keratin damages hair and whether it causes hair to fall out, treating both as real risks rather than myths.

Watch the verdict at 12:35 on YouTube
Dana Dey: Keratin Treatment Vs. Brazilian Blowout? The Facts + My Experiences! | Dana Dey9:08
It dependsCurly-haired user who has tried both treatments
Dana Dey

357K views

After trying both, she walks through the facts and cost of each and lands on a clear preference for the keratin complex treatment over the Brazilian blowout.

She stresses that price varies a lot by region and that aftercare, especially avoiding certain products, is what makes the results actually last.

Watch the verdict at 9:08 on YouTube
Lisa J: Keratin Hair Treatments | FAQS, Process and is it Worth It? | Come with Me to Get One12:00
Worth itRepeat salon client
Lisa J

181K views

As a returning client she finds keratin worth the money, and notes her results actually improved when she got treatments closer together rather than years apart.

Her stylist charges about $350 to $400 per visit, and she got noticeably better results the second time getting them within a few months.

Watch the verdict at 12:00 on YouTube
Sierra LaFaye: Beware of Keratin Treatments | Things to Know Before Getting a Keratin | Keratin on Curly Hair1:30
It dependsCurly and natural-hair user
Sierra LaFaye

121K views

She does not write keratin off but urges caution, listing things she wishes she had known and telling curly and natural-hair viewers to confirm it suits their hair type first.

Her warnings are aimed specifically at curly and natural hair, where the treatment can loosen or alter the curl pattern.

Watch the verdict at 1:30 on YouTube
Nadine Baggott: THE TRUTH ABOUT KERATIN & BRAZILIAN STRAIGHTENING SMOOTHING13:00
It dependsVeteran beauty journalist

Reviewing a salon smoothing treatment seven weeks on, she is pleased with the frizz reduction but openly refuses to gloss over the unresolved formaldehyde-safety question.

She publicly asks formulating chemists to help clarify the formaldehyde issue, treating the safety debate as genuinely unsettled rather than hype.

Watch the verdict at 13:00 on YouTube
KWKosta: TESTING O'WOW / ANSWR SMOOTHING KIT ON MY DRY, FRIZZY, CURLY HAIR - IS IT WORTH IT?7:44
It dependsIndependent buyer testing an at-home kit
KWKosta

35K views

Skeptical of the Instagram ads, she bought the at-home kit herself and found it genuinely smooths hair, but with too little product, a bad smell, and results gone by six weeks she calls the value a maybe.

The kit worked and held through a few washes, but she says it is too expensive to repeat and better saved for a one-off special event than used regularly.

Watch the verdict at 7:44 on YouTube

Where they agree

  • +It really does reduce frizz and leave hair smoother, shinier, and faster to style.
  • +The results are temporary and fade over a few months, sooner with at-home kits.
  • +It smooths and loosens curl rather than permanently straightening; texture returns as it grows out.
  • +Aftercare matters: sulfate-free products and not washing too soon help it last.
  • +The chemical smell and fumes during application are strong and unpleasant.

Where they split

  • /Whether it damages hair long-term, with some reporting breakage and shedding and others none.
  • /How seriously to take the formaldehyde and fume safety concern.
  • /Whether cheap at-home kits can match salon results or are a waste of money.

Our take

Almost every reviewer agrees keratin works while it lasts, so the decision is really about money, not results. A salon treatment at roughly $300 to $500 every few months can quietly become $900 to $2,000 a year, while at-home kits run $30 to $200 but fade faster and are hit or miss. Run your own numbers in the keratin treatment cost calculator to see how many salon visits a DIY kit would have to replace before it pays for itself.

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