Olaplex's No.3 Plus Complete Repair Treatment went on sale in late March 2026, priced at roughly €21 to €28 for 100ml and €38 to €49 for 250ml depending on market, according to the price comparison site Heise. It replaces the No.3 Hair Perfector that built Olaplex's reputation, and the formula change is worth scrutinizing before handing over your card.
The product is a pre-shampoo treatment, applied to dry or towel-dried hair and left on for three minutes before washing out. It still relies on Olaplex's patented Bond Building Technology, the chemistry that repairs broken disulfide bonds in damaged hair, but the new version adds what the brand calls a Damage Defense Cationic Complex, according to trade coverage in Salon Business. That addition is the headline change from the original formula, and it is why Olaplex is calling this a relaunch instead of a simple reformulation.
Retailer listings for the product, including pages on Rawhair and LookFantastic, repeat a manufacturer claim that hair becomes three times stronger and softer after four uses. That figure is worth reading with some caution. It traces back to brand-commissioned testing, not an independently published clinical study, and no third-party data on the reformulated product has surfaced yet. The claim may well hold up in daily use, but it is a marketing number before it is a scientific one, and anyone comparing it against bond-building rivals like K18 or Redken should know the comparison is being made on Olaplex's own terms.
The underlying ingredient logic is sound enough to take seriously. The original No.3 built its name on maleic acid, a small molecule that slips into hair strands and reconnects broken bonds left by bleach, heat, or chemical color services. That is why stylists reached for it before a lightening appointment instead of treating it as a daily conditioner swap. The Plus formula keeps that bond-repair base and layers a cationic polymer complex on top, the kind of positively charged ingredient that clings to damaged, negatively charged hair strands to smooth the cuticle and cut static and breakage during brushing. On paper, that is a sensible pairing: one ingredient class addresses internal bond damage, the other addresses surface feel and manageability.
The three minutes matters as much as the ingredients. Olaplex has kept the short, pre-shampoo application window consistent across both versions of No.3, which sets it apart from heavier overnight hair masks that promise similar repair claims but ask for far more patience. For a reader timing a weeknight shower around a toddler's bedtime or a commute, a three-minute treatment that slots before shampoo is a meaningfully different product to live with than a thirty-minute mask, regardless of what either does under a microscope.
None of this formula news is happening in a vacuum. Olaplex relaunched No.3 in the same window that German consumer-goods group Henkel agreed to acquire the company for about $1.4 billion, a deal confirmed on 26 March 2026, according to Personal Care Insights and CosmeticsBusiness. That price values Olaplex at a fraction of the roughly $13.6 billion it commanded at its February 2021 Nasdaq debut, a gap that reporting from Dow Jones, carried by Morningstar, traced to a share price collapse of nearly 90 percent by the end of 2023 amid lawsuits, intensifying competition from newer bond-building brands, and a sharp slowdown in sales growth.
Some of those lawsuits bear directly on how a shopper should weigh a repair claim from this brand specifically. A 2023 consumer suit filed in the Central District of California, covered by NewsNation, gathered roughly thirty plaintiffs alleging hair loss and scalp injuries tied to ingredients including lilial and panthenol in earlier Olaplex products. Olaplex denied the allegations and has not recalled any product over them, and the case's current status is unclear from public reporting. Separately, a securities class action over Olaplex's IPO disclosures settled for $47.5 million, and a related stockholder derivative suit reached a settlement executed on 24 April 2026 and preliminarily approved on 7 May 2026, according to case filings tracked by the law firm Labaton, requiring governance changes alongside legal fees.
None of that litigation concerns the new cationic complex in No.3 Plus, and there is no indication the reformulated product shares the ingredients named in the hair-loss suit. But a brand selling a three-times-stronger claim while mid-acquisition and still working through IPO-era litigation is a brand worth reading closely rather than taking at its word. The three minutes in the shower are the easy part. The harder part is deciding how much weight to put on a number that, for now, only the company making the product has actually measured.
