Olaplex
Haircare
Does it live up to its claims?
Evi Evidence
Limited
1 relevant study reviewed
Review date not recorded
Report details / 01
The pre-shampoo bond treatment that defined the at-home repair category.
Claims audit / 02
Each claim is rated separately. Ingredient evidence does not prove that this finished product produces the same result.
Claim 01 / Bis-aminopropyl diglycol dimaleate
The patented chemistry is plausible, and reduced breakage is consistent with conditioning treatments, but independent human studies isolating this molecule are scarce.
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
It can make heavily processed hair feel stronger and easier to comb.
Most public efficacy evidence is not independent clinical research.
It is a rinse-out treatment, not a permanent cure for split ends.
Evidence profile
What's in it
Bis-aminopropyl diglycol dimaleate
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
A useful damage-care treatment with limited independent proof for its signature bond claim.
An evidence-focused interpretation—not a diagnosis or personalized medical treatment advice.
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
Repairs broken disulfide bonds inside damaged hair.
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.
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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: K18Peptide
Evidence for the relevant claim
For “Reconnects keratin chains damaged by bleach and heat.”: Limited — the same evidence level as the identified product’s closest claim.
What are you paying for?
No verified price is recorded.
02 / Wildroot Co.
What is similar?
Also haircare / Comparable evidence-backed claim
What is different?
Different key active: Rosemary oil, Peppermint oil
Evidence for the relevant claim
For “Regrows hair as well as minoxidil.”: Promising — stronger evidence than the identified product’s closest claim.
What are you paying for?
No verified price is recorded.
03 / COSRX
What is similar?
Comparable evidence-backed claim
What is different?
Different key active: 96% snail secretion filtrate
Evidence for the relevant claim
For “Hydrates, repairs the barrier, and fades marks.”: Promising — stronger evidence than the identified product’s closest claim.
What are you paying for?
No verified price is recorded.
04 / Seolhwa
What is similar?
Comparable evidence-backed claim
What is different?
Different key active: Snail secretion filtrate, Sodium hyaluronate
Evidence for the relevant claim
For “Repairs the barrier, fades scars, heals everything.”: Promising — stronger evidence than 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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