ANATOMY vs Olaplex: a mechanism comparison

Two haircare brands, two different chemistries, two different evidence bases. ANATOMY uses thiol-ene and thiol-yne click chemistry — the reaction class that won the 2022 Nobel Prize in Chemistry — to form new covalent C–S bonds inside the cortex via two patented molecules: Pro-amino X and Aminalyl S. Olaplex uses a single bifunctional crosslinker, bis-aminopropyl diglycol dimaleate, to bridge sulfur sites on damaged disulfide bonds. This page compares the mechanisms, the public clinical data, and the application contexts so the choice rests on chemistry, not marketing.

At a glance

Axis	ANATOMY	Olaplex
Active chemistry	Thiol-ene + thiol-yne click chemistry	Single bifunctional crosslinker
Patented molecules	Pro-amino X · Aminalyl S	Bis-aminopropyl diglycol dimaleate
Reaction site	Free thiols on cysteine residues in the cortex	Sulfur sites on broken disulfide bonds
Bond formed	New covalent C–S bonds	Sulfur-bridge crosslink
Public clinical proof	135% tensile strength gain (SGS Proderm 24.0172-96; n size disclosed)	Brand-published efficacy data
Patent status	3 granted patents	Multiple granted patents
Salon vs at-home	At-home protocol (3 steps)	Both: salon (No. 1/2) + at-home (No. 0, 3, etc.)
Hair-type targeting	Mechanism applies broadly; calibrated for bleached/heat-damaged	Same — broad applicability
Origin	Switzerland	United States
Where it wins	Independent SGS Proderm tensile data; click chemistry mechanism	Salon distribution, brand recognition, in-process step (No. 1)

How ANATOMY works

Two patented bifunctional molecules diffuse to the cortex during application. Once inside, they encounter free thiol groups on cysteine residues — the chemical signatures of broken disulfide bonds — and form C–S covalent bonds via two click reactions: thiol-ene (with one molecule's alkene) and thiol-yne (with the other's alkyne). The reaction class won the 2022 Nobel Prize in Chemistry, awarded to Carolyn R. Bertozzi, Morten Meldal, and K. Barry Sharpless.

The bond formed is covalent and not thermally reversed by heat styling at typical temperatures. Crosslink density grows with cumulative use because the reaction is thermodynamically favorable at room temperature and the population of reactable thiols is large in damaged hair.

How Olaplex works

Olaplex's flagship molecule is a single bifunctional crosslinker that reaches sulfur sites on damaged or broken disulfide bonds and forms a sulfur-bridge crosslink. The salon system (No. 1 + No. 2) is applied during chemical services to mitigate damage at the moment of processing; the consumer line (No. 0, No. 3, etc.) extends maintenance to home routines.

Olaplex's reaction targets the same general problem ANATOMY targets — disulfide damage — but uses a single-molecule chemistry and a different reaction class. The body of public efficacy data is brand-published.

Independent clinical data

ANATOMY publishes the SGS Proderm 24.0172-96 study: single-fiber tensile testing on bleached hair, comparing untreated bleached fibers to fibers treated with the full ANATOMY protocol. Method: laser cross-section + controlled extension to break.

Measurement	ANATOMY result
Tensile strength gain	135% (15.2 → 35.8 cN)
E-modulus reduction	~15% (restored flexibility)
Bis-adduct formation	81.5% (LC-MS analysis)

Olaplex publishes its own efficacy studies on the brand site; we do not have an independent third-party tensile-testing study comparable to 24.0172-96 to cite here.

What Olaplex does better

Honest concessions matter. Olaplex wins on:

• Salon integration. Olaplex No. 1 is added directly to lightener, bleach, and color formulas during the chemical service. ANATOMY does not have an in-process salon step.
• Brand distribution. Olaplex is widely available in salons and large retailers; ANATOMY is direct-to-consumer.
• Track record. A longer market history with more salon-side testimonials and case histories.

If the priority is in-process salon damage mitigation during a color service, Olaplex No. 1/2 is the correct tool today.

Where ANATOMY wins

• Mechanism. Click chemistry forms new covalent bonds at sites of damage, rather than bridging existing damaged sulfur sites with a single molecule. The reaction class is Nobel-recognized.
• Independent tensile data. SGS Proderm 24.0172-96 is third-party measurement on bleached hair with disclosed methodology and study ID.
• Two-molecule system. Pro-amino X and Aminalyl S together produce reinforced crosslink networks; a single crosslinker leaves more thiol sites unreacted.
• At-home depth. The 3-minute conditioner dwell + leave-in carries sufficient contact time to drive the reaction to a useful crosslink yield outside salon supervision.

Best fit by hair type

Hair situation	Recommendation
In-salon during a bleach service	Olaplex No. 1 in the formula
Maintenance after bleach (at home)	ANATOMY 3-step protocol or Olaplex No. 3
Heat-damaged from styling tools	ANATOMY (no salon step required)
Color-treated, no bleach	Either; ANATOMY's reconstruction targets cortex-level changes
Mechanically broken, no chemical history	ANATOMY (mechanical damage exposes thiols too)

Honest verdict

If you can choose only one product to use during a salon bleach service, that is Olaplex No. 1's job. If you want the deepest at-home reconstruction supported by independent tensile data on bleached hair, ANATOMY's 3-step protocol is the choice. The two are not exclusive — Olaplex during processing and ANATOMY for ongoing reconstruction is a sensible combined regimen.

FAQ

Can I use both? Yes. They target the same physical site (the cortex; broken or compromised disulfide infrastructure) via different reaction chemistry. There is no known antagonism. Use Olaplex during in-salon services if available; use ANATOMY for at-home reconstruction.

Why does ANATOMY's number sound bigger than Olaplex's? "135% increase in breaking force" is a specific instrument reading on a specific bleached-hair substrate (SGS Proderm 24.0172-96). It is not a general claim that ANATOMY hair is "135% stronger than Olaplex hair." Direct head-to-head testing on identical substrates with identical methodology has not been published.

Is one safer than the other? Both have well-characterized chemistries. Neither contains thioglycolates, formaldehyde, or harsh perm chemistry. Patch testing is sensible for any scalp-contact product.

Which is better for bleached hair? Independent third-party tensile data on bleached hair exists for ANATOMY. For at-home maintenance of bleached hair, that data tilts the answer toward ANATOMY. For in-process bleach mitigation, Olaplex No. 1.

What about K18? K18 uses a peptide-based mechanism (different again). See Olaplex vs K18 and ANATOMY vs K18.