Heat-damaged hair treatment · molecular reconstruction
Heat-damaged hair needs reconstruction before more styling.
That snapping isn't dryness. Heat breaks the disulfide bonds inside the cortex — the structure that lets hair bend instead of break. Coatings can't rebuild those bonds. ANATOMY's click chemistry forms new ones — measured by SGS Proderm at a 135% strength increase on bleached hair, the hardest case there is.
The One-Cycle Guarantee — run the Complete System through one full 60-day cycle. If your hair isn't visibly different, we refund it.
ANATOMY® Complete Reconstruction System
60 seconds · AI-guided interpretation of your hair history · informed by peer-reviewed hair-fibre research
Choose your reconstruction path
Begin with the protocol that fits the damage.
The Complete Reconstruction System is the measured three-step protocol. The Leave-In is the concentrated single-step entry.
ANATOMY® Complete Reconstruction System
Three steps designed to prepare, reconstruct, and protect damaged hair as one measured protocol.
Molecular Reconstruction Leave-In
The concentrated leave-in path for ongoing reconstruction and protection between washes.
Full Protocol
The Complete Molecular System
All three steps. Each product primes the next: the shampoo prepares, the conditioner reconstructs, the leave-in seals. The measured 135% result belongs to the full protocol.
Priced the same as the three steps bought separately, with shipping included — the difference is the sequence, and the sequence is what was measured.
$169.00
All 3 Steps- 60-Day One-Cycle Guarantee — visibly different, or refunded
- Complimentary shipping on the Complete System
- Shampoo 250 ml · Conditioner 250 ml · Leave-In 100 ml
Build your protocol
Shop the individual steps
Bestseller
Step 03 · Seal
Molecular Reconstruction Leave-In
The longest-contact step: a concentrated leave-in for fragile, porous, heat-styled lengths.
$85.00
60-Day One-Cycle Guarantee
View detailsStep 1
Step 01 · Prepare
Molecular Pre-Construction Shampoo
Deeply cleanses and prepares damaged hair fibers for molecular reconstruction.
$42.00
60-Day One-Cycle Guarantee
View detailsStep 2
Step 02 · Treat
Molecular Reconstruction Conditioner
The rinse-out reconstruction step that rebuilds weakened lengths from the cortex out.
$42.00
60-Day One-Cycle Guarantee
View detailsNew to ANATOMY? Most people start with the Leave-In.
Measured in the lab. Noticed at the brush.
Less snapping. Easier combing. Lengths that hold together after washing.
Where should I start?
If you style with heat regularly, start with the Leave-In: it stays on the hair longest and is the most practical single-step entry. If your hair is already compromised (breakage, porosity, colour), the complete system rebuilds fastest because each step primes the next.
Is heat protection not enough?
Protection limits new damage. It does not rebuild bonds that are already broken. Reconstruction comes first; protection works better once the fiber underneath is less compromised.
What if it doesn't work for me?
Every order is covered by The One-Cycle Guarantee — run the system through one full 60-day cycle. If your hair isn't visibly different, we refund it.
What does heat actually do to hair structure?
Repeated blow-drying and hot tools can change both surface behaviour and structural tolerance. Read how heat styling damages hair structure.
Rebuild the structure underneath the styling.
Begin the full protocol for the fastest rebuild, or start with the Leave-In if you want one step first. Either way, you're treating the damage, not just coating it.
Complimentary US shipping · 60-Day One-Cycle Guarantee · ★ 4.8 (768 reviews, Leave-In step)
The Reconstruction Protocol
Get the Reconstruction Protocol.
The damage-specific rebuild guide in three editions — bleach, heat, breakage — with the ten-minute diagnostic and the week 2/4/8 timeline. Sent by email, with a private 10% first-order code.
Keep reading
The research behind this page
Chosen for this page. The full method lives on the science page.
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Heat Damaged Hair: Surface Feel vs Structure
What heat does to the cortex.
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Why Damaged Hair Breaks When Brushed
Why hair snaps at the brush.
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Disulfide Bonds: The Cross-Links That Make Hair Strong
The bonds that let hair bend.
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What Is Tensile Testing for Hair?
How strength is actually measured.
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Do Bond Builders Actually Work? What the Chemistry Says.
What bond builders can and cannot do.
Complete system: shampoo, conditioner, leave-in.