K18
Haircare
Does it live up to its claims?
Evi Evidence
Limited
2 relevant studies reviewed
Review date not recorded
Report details / 01
The four-minute leave-in treatment built around a proprietary biomimetic peptide.
Claims audit / 02
Each claim is rated separately. Ingredient evidence does not prove that this finished product produces the same result.
Claim 01 / K18Peptide
The biomimetic theory is plausible and laboratory data are brand-backed, but independent peer-reviewed clinical comparisons of the proprietary sequence are limited.
See researchEvidence review / 03
Evi rates the research behind each claim. Unless an exact-product study is recorded, ingredient findings describe the ingredient—not proof that this finished formula produces the same result.
What we found
Conditioned hair can feel dramatically smoother after one use.
That does not prove permanent molecular repair inside every strand.
Use the smallest effective amount; excess can weigh fine hair down.
Evidence profile
What's in it
K18Peptide
Not yet in Evi's ingredient index
How direct is the evidence?
How the rating was reached
Limited
Evi never assigns numeric scores. The level follows fixed rules from recorded research, so the same evidence always gives the same result.
Independent summary
Promising cosmetic repair with strong user appeal, but the proprietary mechanism needs independent trials.
An evidence-focused interpretation—not a diagnosis or personalized medical treatment advice.
What changed
Source library / 04
Peer-reviewed sources reviewed for this report. Study population and sample details appear only when they are present in Evi's verified record.
Claim 01
Reconnects keratin chains damaged by bleach and heat.
International journal of trichology · 2015 · DOI 10.4103/0974-7753.153450
Review
This article reviews the formulations and mode of action of hair cosmetics like shampoos and conditioners to help dermatologists treat hair and scalp conditions.
Biotechnology reports (Amsterdam, Netherlands) · 2018 · DOI 10.1016/j.btre.2018.e00288
In a lab study, a recombinant human keratin protein (K31) increased the diameter and mechanical strength of chemically damaged hair.
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Alternatives / evidence compared
Matched on verified category, use, actives, formulation, claims, attributes, size, price and evidence. Relevance depends on the claim or use case—Evi does not name a universal winner.
What is similar?
Also haircare / Also for hair damage / Also for breakage / Also for bond repair
What is different?
Different key active: Bis-aminopropyl diglycol dimaleate
Evidence for the relevant claim
For “Repairs broken disulfide bonds inside damaged hair.”: Limited — the same evidence level as the identified product’s closest claim.
What are you paying for?
No verified price is recorded.
Using it / 05
A grounded starting point—not personalized medical advice.
Follow the product label and introduce one new product at a time so you can notice benefits or irritation.
Check the active ingredients and concentration, then compare the product’s claim with the evidence rating above.
Patch-test topical products and check supplements against medications, allergies, pregnancy, and existing conditions.
Purchase notes / verified retailers
Prices, sizes and availability appear only when Evi has a current retailer record. Retailers are listed in Evi's fixed order, never by commission. Check final details with the retailer.
Affiliate disclosure: Evi may earn a commission when you purchase through certain links. Affiliate relationships never affect Evi's evidence ratings.
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