Honest brand comparison — Updated 2026
QIQI vs Kativa vs GK Hair.
The four most popular keratin treatment brands in the US compared head to head. QIQI Hair Controller, Kativa Brazilian Keratin, GK Hair "The Best", and Keratin Research. Price, longevity, formaldehyde safety, and which one actually delivers.
Before you choose
What separates a good keratin treatment from a great one.
Amazon US is packed with keratin treatments at every price point. The challenge is not finding one — it is knowing which ones deliver professional-grade results and which ones are repackaged formulas with inflated claims.
The factors that actually matter are longevity (how many months the results last), safety (verified formaldehyde-free, not just labelled), formula matching (whether the product is designed for your specific hair type), and cost per treatment (not just the sticker price, but how many applications you get per bottle).
We compared four leading brands across these criteria. We sell QIQI Hair Controller, so we are transparent about that. But the comparison below is factual — we will let you decide which brand fits your needs.
Longevity
Key factor
Formaldehyde-free
Essential
Hair type matching
Important
Cost per treatment
Key factor
Brand 1 — Professional-grade, longest lasting
QIQI Hair Controller.
Australian brand. Glyoxylic acid-based permanent smoothing that restructures disulfide bonds under heat. Three formulas matched to hair type — Thick & Coarse, Wavy & Curly, and Thin & Delicate. Results last up to 5 months. Each 150g bottle provides 3 or more treatments depending on hair length and density.
QIQI was designed for both salon and home use. There is no formaldehyde in the bottle — glyoxylic acid releases traces at flat-iron heat, so ventilate. At $168 per bottle, it works out to roughly $56 per treatment, compared to $200 to $500 for a salon session. This is the only brand we carry that delivers permanent smoothing, and it is the treatment we recommend for anyone looking for lasting, professional-grade results at home.
From $129 · 150g
Hair Controller — Thick & Coarse
Formaldehyde-free permanent smoothing treatment for thick, coarse, and afro-textured hair. Softens disulfide bonds under heat for lasting frizz control — from defined curls to fully straight. QIQI Hair Controller results last up to 5 months.
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From $129 · 150g
Hair Controller — Wavy & Curly
Permanently reduces frizz and enhances natural pattern definition — or delivers a smooth, controlled finish. Designed specifically for wavy and curly hair. Formaldehyde-free. Lasts up to 5 months.
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From $129 · 150g
Hair Controller — Thin & Delicate
Formaldehyde-free permanent smoothing for fine, colour-treated, or delicate hair. Eliminates frizz and reduces volume without over-processing. QIQI Hair Controller safe for bleached and highlighted hair. Results last up to 5 months.
Shop now →Brand 2 — Budget-friendly Amazon bestseller
Kativa Brazilian Keratin.
Brazilian brand and one of the top-selling keratin treatments on Amazon US. Kativa offers an affordable entry point into keratin smoothing at $25 to $40 for a kit. The treatment delivers temporary smoothing that lasts 8 to 12 weeks, with noticeable frizz reduction and improved manageability.
Kativa claims to be formaldehyde-free and uses a single formula for all hair types. The results are real but lighter than professional-grade treatments — you will get smoothing and shine, but do not expect the same level of straightening or frizz elimination you would get from a salon treatment or a professional formula like QIQI.
If you have never tried keratin treatment before and want to test the concept at a low price point, Kativa is a reasonable starting point. Just be aware that the results fade faster and the single-formula approach means it is not optimised for your specific hair type.
Brand 3 — Salon brand gone consumer
GK Hair "The Best."
GK Hair is a well-known professional brand that built its reputation in salons with its Juvexin technology — a proprietary keratin protein complex. "The Best" is their flagship smoothing treatment, originally designed for salon application and now available for home use through Amazon and other online retailers.
The results are professional-grade. GK Hair delivers strong smoothing and frizz control that competes with high-end salon treatments. However, the price reflects this — expect to pay $80 to $150 for a treatment depending on the size and formula.
The formaldehyde question is more complex with GK Hair. While the brand markets its products as formaldehyde-free, independent analyses have found aldehyde compounds in some formulations. Aldehydes can release formaldehyde gas at the high temperatures used during flat-iron application. If formaldehyde safety is a priority for you, check the ingredient label carefully before purchasing.
Brand 4 — Another Amazon bestseller
Keratin Research.
Keratin Research is a popular Amazon brand that offers multiple keratin treatment formulas in the $35 to $50 range. The brand has built a solid presence on Amazon US with competitive pricing and a range of options including Brazilian-style treatments and express formulas.
Results are decent for the price point — temporary smoothing and frizz reduction that lasts 8 to 12 weeks. The brand claims formaldehyde-free formulations and offers multiple product lines for different needs.
Like most Amazon keratin brands, results can be inconsistent depending on which specific formula you choose and your hair type. The lack of hair-type-specific formulas means you are relying on a general formula rather than one engineered for your texture.
Head to head
All four brands compared.
| Feature | QIQI | Kativa | GK Hair | Keratin Research |
|---|---|---|---|---|
| Type | Permanent smoothing | Temporary smoothing | Professional smoothing | Temporary smoothing |
| Longevity | Up to 5 months | 8–12 weeks | 3–5 months | 8–12 weeks |
| Formulas | 3 (by hair type) | 1 | Multiple | Multiple |
| Price | ~$56/treatment | $25–$40/kit | $80–$150 | $35–$50/kit |
| Formaldehyde-free | Yes (verified) | Claimed | Check label | Claimed |
| Home use | Designed for it | Yes | Originally salon | Yes |
| Hair type matching | 3 dedicated formulas | No | Some variation | Limited |
| Aftercare range | Full range | Basic | Full range | Basic |
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The bottom line
Why we chose to stock QIQI.
We tested and researched dozens of keratin treatment brands before deciding what to carry. All four brands on this page produce real results. Kativa and Keratin Research are solid budget options. GK Hair is a proven salon performer. Any of them can improve your hair.
We chose QIQI Hair Controller because it delivers the best combination of the things that matter most: longevity (up to 5 months per treatment), verified formaldehyde-free safety, three formulas matched to different hair types instead of a one-size-fits-all approach, and a price per treatment ($56) that undercuts salon visits by 75% or more.
The fact that it was designed for home use from the start — rather than adapted from a salon product — means the instructions are clear, the process is straightforward, and you do not need commercial ventilation. For most people looking for a professional-grade keratin treatment they can do at home in the US, QIQI is the strongest option available.
Common questions
Keratin treatment brands — FAQ
Which keratin treatment brand is best?
It depends on what you prioritize. For the longest-lasting results (up to 5 months), formaldehyde-free safety, and professional-grade formulas matched to your hair type, QIQI Hair Controller is the strongest option. Kativa is a good budget entry point. GK Hair delivers salon-quality results but costs more and contains aldehydes. Keratin Research is another affordable Amazon option with mixed consistency.
Is Kativa keratin any good?
Kativa Brazilian Keratin is a decent entry-level treatment. It reduces frizz and adds smoothness for 8 to 12 weeks. The results are lighter than professional treatments — you will notice improvement, but it will not deliver the same level of straightening or frizz elimination as salon-grade formulas like QIQI or GK Hair. For the price ($25 to $40), it is a reasonable starting point if you have never tried keratin treatment before.
Is GK Hair formaldehyde free?
GK Hair markets its treatments as formaldehyde-free, but independent testing and ingredient analysis have found aldehyde compounds in some GK Hair formulas. Aldehydes can release formaldehyde gas when heated during flat-iron application. Always check the full ingredient list and look for terms like glutaraldehyde or methylene glycol. QIQI Hair Controller uses glyoxylic acid, which is a genuinely different chemistry — no formaldehyde in the bottle.
QIQI vs Kativa — which lasts longer?
QIQI Hair Controller lasts significantly longer. QIQI delivers permanent smoothing that lasts up to 5 months as the treated hair grows out. Kativa Brazilian Keratin is a temporary treatment that washes out over 8 to 12 weeks. If you want lasting results without frequent reapplication, QIQI is the clear winner.
What's the best professional keratin for home use?
QIQI Hair Controller was designed from the ground up for both salon and home use. It is formaldehyde-free, requires no commercial ventilation, and comes with clear step-by-step instructions. Each of the three formulas is matched to a specific hair type, so you get a treatment tailored to your hair rather than a generic one-size-fits-all product. GK Hair is also used at home but was originally formulated for salon application.
Are Amazon keratin treatments safe?
Not all of them. Amazon hosts a wide range of keratin treatments, and quality varies enormously. Some products labelled "formaldehyde-free" still contain aldehyde derivatives that release formaldehyde when heated. Always check the full ingredient list before buying. Look for products that are transparent about their active ingredients. QIQI Hair Controller uses glyoxylic acid and is verified formaldehyde-free. With any keratin treatment, ventilate the room during application.
Which keratin treatment has the best reviews?
All four brands have strong review profiles. Kativa and Keratin Research benefit from high Amazon review volumes due to their lower price points. GK Hair has a loyal following among salon professionals. QIQI Hair Controller has consistently positive reviews from users who value long-lasting results and formaldehyde-free safety. The best reviews tend to come from people who matched the right product to their hair type and followed the application instructions carefully.
Is QIQI Hair Controller worth the price?
At around $56 per treatment (each $168 bottle provides 3 or more treatments), QIQI is more expensive per application than Kativa or Keratin Research but significantly cheaper than salon treatments ($200 to $500 per session). The key difference is longevity: QIQI lasts up to 5 months compared to 8 to 12 weeks for most competitors. When you factor in how often you need to reapply, QIQI works out to be the better value over a year.
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Professional keratin. Delivered.
Formaldehyde-free. Up to 5 months per treatment. Three formulas matched to your hair type. Professional salon-grade results at home.