The Truth About Olaplex and Hair Damage, What Actually Breaks Your Hair
The Olaplex Conversation, Cleared Up
A few years ago Olaplex was the most loved product in the salon industry. Then a lawsuit landed, some social media posts went viral, and suddenly every client was asking me whether Olaplex had caused their breakage. The truth sits somewhere between the hype and the panic.
At Kohort on Bridge Road in Richmond, I run the smoothing and bond care side of our service menu. That means Olaplex comes out in almost every chemical service I do, along with K18 Molecular Repair and other bond builders. I have watched what actually breaks hair across thousands of appointments, and Olaplex on its own is almost never the culprit.
This is the full conversation I have with clients who are scared of Olaplex, written down. By the end of it you will know what actually damages hair, where Olaplex fits in the picture, the correct way to use it, and when something else is the better tool.
The Direct Answer, What Actually Damages Hair
Here is the honest hierarchy of damage causes, from most to least common.
| Damage source | How much it matters | What it does |
|---|---|---|
| Chemical over-processing (bleach, strong colour) | Very high | Breaks disulfide bonds, thins cortex, shatters cuticle |
| Daily high-heat styling | High | Oxidises pigment, dehydrates cortex, breaks cuticle |
| Mechanical stress (tight ties, brushing wet) | High | Snaps strands at stress points, creates mid-length breaks |
| Hard water and mineral build-up | Moderate | Coats cuticle, reduces product penetration, dulls colour |
| Sun and UV exposure | Moderate | Oxidises lightened hair, bleaches tone, dehydrates |
| Overuse of bond builders (yes, really) | Low to moderate | Can overload hair with protein, causing stiffness or brittleness |
| Wrong shampoo | Low | Sulphates strip colour and natural oils |
| Hair genetics and age | Baseline | Cortex diameter, porosity and elasticity shift over time |
Olaplex and other bond builders sit at the bottom half of that list for a reason. Used correctly, they reinforce the internal structure of the hair. Used excessively, they can add to protein overload, which feels stiff. Misused on the wrong hair, they can tip an already fragile strand into breakage, but the hair was almost always compromised first.
What Olaplex Actually Does
Olaplex is a family of products built around a patented active ingredient called bis-aminopropyl diglycol dimaleate. That is a mouthful, so in plain English, it is a molecule that relinks broken disulfide bonds in hair.
Disulfide bonds are the strongest chemical bonds in hair. They are what give your strands their shape, strength and elasticity. Every time you bleach, perm, colour, flat iron at high heat, or stretch hair aggressively, you break some of those bonds. Olaplex No.0 and No.3 re-link them.
What Olaplex is not
- It is not a moisturiser. Do not rely on it instead of a conditioning mask.
- It is not a protein treatment. It does not add protein, it repairs bonds.
- It is not a heat protectant. Spray a proper thermal protectant before styling.
- It is not a substitute for not damaging your hair. It reduces damage during chemical services, it does not make bad hair habits safe.
The Olaplex lineup, simplified
- No.0, a salon-strength intensifier for professional use, occasionally sold retail.
- No.1, a salon additive mixed into bleach and colour to protect bonds during the service.
- No.2, applied after rinsing bleach or colour, to continue the repair.
- No.3, the home-use weekly mask that most clients know.
- No.4 and No.5, shampoo and conditioner.
- No.4P, the purple shampoo for blondes.
- No.6 and No.7, styling products.
- No.8, a bond smoother mask.
- No.9, a leave-in spray.
Bonding Treatment (the in-salon ritual at Kohort) combines several of the strongest steps to repair bonds during a colour, cut or smoothing appointment. Bond Shaper Curl Rebuilding is a curl-specific bond service designed to restore pattern and elasticity to curly hair. Chelating Treatment is a separate service, not a bond treatment, that lifts metals and minerals from the hair before other chemical work.
Did Olaplex Cause The Damage
The short answer is almost always no. Here is what actually happened in most cases where clients thought Olaplex damaged their hair.
The bleach was the problem, not the bond builder
If a client bleaches their hair three times in a row without giving it time to recover, the cortex thins. Olaplex is mixed into the bleach, and when the hair eventually snaps, it is blamed on the product that was the closest to the breakage moment. The bleach was the cause. Olaplex slowed it down.
The hair was already compromised
Damage compounds over time. If a client has been lightening for years, sleeping in tight buns, running GHDs at 210 degrees five days a week, and hitting chlorinated pools every weekend, the breakage is cumulative. An Olaplex treatment applied to hair that is already in failure cannot reverse that load.
The at-home routine was wrong
Olaplex No.3 is a pre-shampoo treatment. Leave it on for ten minutes minimum, rinse, then shampoo. Apply once a week. Many clients use it daily, or leave it on for hours overnight thinking more is better. Overuse plus no moisture causes stiffness that reads as damage.
It was used on the wrong hair
Olaplex No.3 is not ideal for very fine, low-elasticity hair that needs moisture more than it needs bond repair. For that hair type, a moisture mask works better. A proper stylist will tell you which you need.
The Correct Way To Use Olaplex At Home
Here is the rule set.
- Once a week. Not more. Not every wash.
- Apply to wet, towel-dried hair. Not dry, not soaking.
- Leave on for ten minutes minimum. Thirty is fine. Overnight is pointless and can stiffen.
- Rinse well, then shampoo and condition.
- Follow with a proper moisture mask once a fortnight. Kérastase Masquintense or Davines OI Mask work alongside Olaplex, not against it.
- Skip it the day you are heat styling intensely. The two back to back overload the strand.
Olaplex No.0 can be used once a month as a booster before No.3 for very damaged hair. Spray through damp hair, leave for ten minutes, then apply No.3 on top for another twenty.
If your hair feels stiff or straw-like after a period of Olaplex use, you have tipped into protein overload. Cut back to once a fortnight, double your moisture treatments for three washes, and the balance returns.
K18 Versus Olaplex, The Comparison Clients Ask For
K18 Molecular Repair and Olaplex target different bond types, which is why they work well together rather than against each other.
| Feature | Olaplex | K18 |
|---|---|---|
| Mechanism | Re-links broken disulfide bonds | Repairs peptide chains in the keratin structure |
| Best for | Chemically processed hair, especially after lightening | Heat-damaged, mechanically damaged, colour-treated hair |
| Home use frequency | Once a week (No.3) | Every 4 to 6 washes (leave-in mask) |
| Leave-on time | 10 to 30 minutes | 4 minutes, no rinse |
| Feels like | Thicker, treatment-style | Lightweight, almost imperceptible |
| Cost | Moderate | Higher per ml |
At Kohort we often use both in the same chemical appointment. Olaplex during the lift or colour, K18 after rinsing, before the toner or the blow dry. Clients leave with stronger, smoother hair than they would with either alone.
The rule at home, do not use Olaplex and K18 on the same wash. Stack them means one then the other on separate days, because the mechanisms do not need to fight for the same cuticle window.
Salon Services Where Bond Builders Matter Most
Bond builders are not optional on aggressive services. At Kohort they are built into the appointment, not upsold on the way out.
Lightening and bleach work
Every foil, balayage, foilage and colour correction at Kohort includes Olaplex Bonding Treatment or K18 Molecular Repair in the service price. If your current salon is adding 80 dollars on top for Olaplex during a full head of foils, that is a pricing and education issue.
Smoothing and keratin treatments
Bhave Keratin Smoothing and nanoplasty services get a bond builder before or after the smoothing process, especially on hair that has been coloured. Nanoplasty in particular pairs well with K18 because both repair internal structure.
Colour correction
Correction work is the single heaviest lift on hair integrity. Bond builders are non-negotiable. A good correction session uses Olaplex Chelating Treatment first to strip metals, Olaplex No.1 and No.2 in the lift, and K18 post-service for the peptide layer.
Curl services and Bond Shaper
For curly clients who have been chemically treating or heat styling, Olaplex Bond Shaper Curl Rebuilding is specifically designed to restore pattern and elasticity. This is a separate product to the classic Bonding Treatment and is worth asking about if your curls have gone slack.
Melbourne Specifics, Water And Product Choices
Melbourne's inner-east water sits at 40 to 60 ppm calcium carbonate. Technically soft, but after years of showering, it builds up on the cuticle. That mineral layer reduces how well bond builders penetrate, which is why we run a chelating treatment before major bond services for clients who have been colouring for more than two years.
Humidity on the Yarra side of Richmond, Abbotsford, Collingwood and Fitzroy North swells the cuticle in summer, which can make bond-treated hair feel soft on one day and frizzy the next. A proper shine ritual like Kérastase Fusio Dose or Davines Liquid Luster alongside the bond treatment helps seal the cuticle after the bond work is done.
UV in Melbourne is aggressive year round. Bond builders do not protect against UV, so a leave-in with UV filters should be part of summer routines. The bond work you do in the salon is then preserved between visits.
Most of our bond-heavy clients live in Richmond, Cremorne, Burnley, South Yarra, Prahran and Abbotsford, and the pattern is the same across the map. Hair that has been coloured or smoothed in the same calendar year benefits from proper bond work at home, supported by monthly to quarterly in-salon treatments.
Red Flags On Bond Treatments
1. Olaplex sold as a cure-all. It repairs bonds, not moisture, not protein deficiency, not split ends.
2. Stylists who charge Olaplex as an extra on every colour appointment without warning. At a proper studio it is built in.
3. Home use at every wash, marketed by influencers. Overuse causes stiffness.
4. Salons using unverified generic bond builders and calling them Olaplex. Ask for the bottle.
5. Clients using Olaplex on fine hair that needs moisture instead. A proper consultation screens for this.
6. Anyone telling you a bond builder at home replaces salon care. They are complementary, not substitutes.
You can read more about our approach to bond building on the hair treatment menu, and Grace leads the smoothing and bond care work. Our approach to colour correction integrates Olaplex and K18 into every session.
Frequently Asked Questions
Does Olaplex damage hair?
Not when used correctly. Olaplex relinks broken disulfide bonds in hair and reduces damage during chemical services. Misuse (daily application, no moisture, overnight soaking) can cause stiffness, but that is a usage issue, not a product fault. Damage blamed on Olaplex is almost always the result of other factors like bleach, heat, or mechanical stress.
How often should I use Olaplex No.3?
Once a week. Apply to wet, towel-dried hair, leave on for ten to thirty minutes, rinse, then shampoo. Overuse can tip hair into protein overload and make it feel stiff.
What is the difference between Olaplex and K18?
Olaplex relinks disulfide bonds broken by chemical services. K18 repairs peptide chains in the keratin structure. They target different types of damage and work well together in the salon. At home, use them on separate days, not the same wash.
Can Olaplex cause breakage?
Not on its own. Breakage happens when hair has been over-processed, heat styled, or mechanically stressed past its limit. Olaplex is often present in appointments where breakage becomes visible, but the cause is usually the aggressive service, not the bond builder.
Can I use Olaplex No.3 every day?
No. Once a week is the correct frequency. Daily use causes protein overload, which makes hair stiff, brittle and prone to snapping. More is not better with bond builders.
Is Olaplex worth the money?
Yes, if you chemically process your hair, heat style frequently or have damaged ends. Its value is in preventing and repairing bond damage. Skip it if your hair is virgin, natural, low-styled, and in good condition, where a simple moisture mask is enough.
Should Olaplex be included in my colour service?
At Kohort, yes. Olaplex Bonding Treatment is built into colour services that involve lift. If your salon charges a substantial extra for Olaplex during a lightening service, ask why.
What is Olaplex Chelating Treatment?
It is a separate salon service that lifts metals, minerals and hard water build-up from the hair before bond work or colour. Chelating is not a bond builder, but it prepares the hair so bond builders and toners work better.
Is K18 better than Olaplex?
Neither is strictly better. They repair different types of damage. K18 is lighter and faster to apply at home. Olaplex is deeper in bond repair for chemically processed hair. The best approach is to use both strategically, not to pick one.
Can Olaplex make hair fall out?
No. Olaplex does not cause hair loss. Hair shedding post-colour can occur when long strands that were already loose are released during washing, but that is unrelated to the bond builder. Persistent shedding should be checked by a GP or dermatologist.
Why does my hair feel stiff after Olaplex?
Protein overload. Cut back to once every ten days or fortnight, add a moisture mask like Kérastase Masquintense or Davines OI Mask to rebalance, and the stiffness resolves in three to four washes.
Can Olaplex fix split ends?
No. Split ends are physical damage to the hair shaft and can only be removed by cutting. Bond builders reinforce the remaining hair and slow the formation of new splits, but they do not mend existing ones.
Is Olaplex safe during pregnancy?
Olaplex does not contain common pregnancy-concern ingredients, but we always recommend checking with your GP for any chemical service. We adjust services for pregnant clients at consultation, including avoiding strong lifts where appropriate.
What To Actually Do
Use Olaplex No.3 once a week. Alternate with a moisture mask. Book salon services that include Bonding Treatment or K18 as part of the price, not an extra. Protect against UV in summer and heat damage every day. Run a chelating treatment once or twice a year if you colour your hair and live in a hard-water suburb.
If your hair is breaking, the fix is rarely just more Olaplex. It is usually a conversation about what has been on the hair over the last year. Come in for a free fifteen minute consultation and we can look at what you are using, what your salon has been doing, and build a routine that rebuilds instead of adds load.
Grace leads the bond care and smoothing work at Kohort. You can book through the stylist directory, read more on the hair treatment page, or start with our keratin smoothing or nanoplasty pages if smoothing plus bond care is the goal.
The truth about Olaplex is that it is a tool. A good tool, used correctly, inside a larger routine. Not a miracle, not a villain. Use it like that and the hair repays the investment.
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