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What Can Haircare Really Do?
What Haircare Products Can — and Cannot — Do
Repair. Restore. Strengthen. Hydrate. Protect.
Haircare packaging is filled with promises. Some describe genuine, measurable cosmetic benefits. Others can be difficult to interpret without understanding what a product is actually designed to do.
Can a conditioner make hair easier to detangle? Yes. Can a styling product change how hair looks and behaves? Absolutely. But does a smoother-looking strand mean the hair shaft has healed itself? Not biologically.
At Melanin & Textures™, we believe good haircare begins with understanding the difference between what a formulation can demonstrate and what a marketing phrase might suggest.
What Haircare Products Can Really Do
1. Cleanse Hair and Scalp
Shampoos contain cleansing agents called surfactants. These help remove sebum, soil and other deposits from hair and the scalp during washing.
Surfactant systems differ in cleansing power and how they interact with hair and skin. That is why two shampoos can feel quite different even when both perform their primary cleansing function.
A shampoo's foam level alone is not a reliable measure of its cleansing effectiveness. The composition of the entire formula matters.
2. Reduce Friction and Improve Detangling
Conditioners and some leave-in treatments can deposit lubricating ingredients on the fibre surface. These may reduce friction and lower the force required during combing.
This is a meaningful benefit, especially for hair that tangles easily or is vulnerable to repeated mechanical stress.
The degree of improvement depends on the product, how it is used and the condition of the hair. Better slip is a cosmetic performance benefit, not proof of biological healing.
3. Improve Softness, Shine and Manageability
Different formulations can modify the way hair feels and appears. Conditioning polymers, selected oils and other ingredients may affect surface lubrication, light reflection and the way strands behave.
These changes may make the fibre feel softer, look smoother or become easier to style.
Some effects are temporary and can diminish after washing, grooming or further exposure to environmental conditions.
4. Help Limit Some Forms of Styling-Related Wear
An appropriate conditioning routine can make grooming gentler by reducing friction. Some specialised formulations are also developed to limit particular forms of heat-related or mechanical damage.
However, the size of any protective effect depends on the product and the conditions under which it is used.
No product should be assumed to make excessive heat, repeated pulling or aggressive chemical processing completely harmless.
5. Modify Particular Hair-Fibre Properties
Some treatments can improve measurable characteristics of damaged hair under controlled testing conditions.
Controlled laboratory studies have demonstrated that certain plant oils can penetrate hair fibres, and that treatments with specific oils studied can improve fatigue resistance in bleached hair fibres. These findings depend on the oils studied and the test conditions; they cannot automatically be applied to every botanical oil or finished product.
A measurable improvement is valuable, but it should not be described as complete restoration to an undamaged state unless the evidence actually supports that conclusion.
What Haircare Products Cannot Automatically Promise
1. Biological Healing of the Visible Hair Shaft
Hair grows from a living follicle, but the exposed hair shaft is made of non-living, keratinised cells.
It cannot replace damaged cells or heal itself in the way living skin tissue does.
Cosmetic treatments may improve appearance, lubrication or specific physical properties without biologically regenerating the fibre.
For a deeper explanation, explore our article Can Damaged Hair Repair Itself?
2. Identical Results on Every Head of Hair
Two people may use the same product and experience different outcomes.
Fibre condition, individual strand characteristics, chemical-processing history, grooming practices and application technique can all influence the result.
A product recommended for one curl pattern is not guaranteed to perform identically on everyone who shares that classification.
3. Guaranteed Benefits From a Single Ingredient Name
Recognising an ingredient on a label can help you understand why it might be included. But a promising ingredient does not prove that the finished product provides the same benefit in practice.
Concentration, surrounding ingredients, deposition, stability, application and testing all matter.
The most useful evidence relates to the specific finished formulation and the specific claim being made.
4. Permanent Results From Every Conditioning Treatment
Many conditioning effects depend on the materials deposited on, or interacting with, the hair fibre.
Their persistence varies. Some effects can decrease through subsequent washing or grooming.
Words such as long-lasting or permanent should therefore be interpreted in the context of product-specific evidence, not assumed from a category name.
What Do Common Haircare Claims Actually Mean?
“Hydrating” or “Moisturising”
In consumer haircare, these terms can refer to improved softness, water-related properties or a reduction in dry-feeling hair. They are not universal scientific descriptions of a single measurable effect.
The claim should make sense in relation to what the product actually demonstrates.
“Repairing”
This may refer to smoothing the surface, improving combability or changing an experimentally measured fibre property.
It should not automatically be read as biological regeneration or complete reconstruction of damaged hair.
“Strengthening”
Depending on the product, this could refer to a specific result measured in tests, such as resistance to breakage or a change in mechanical behaviour.
The method, comparison and tested conditions matter. A broad claim does not tell us everything about how that result was obtained.
“Protecting”
Protection against friction, heat or other stresses is not one single, interchangeable benefit. A product may have evidence for one type of exposure and not another.
The strongest interpretation is the one supported by testing of the finished product under relevant use conditions.
How Do We Know Whether a Product Claim Is Credible?
For cosmetic products sold under the EU/EEA regulatory framework, Commission Regulation (EU) No 655/2013 sets common criteria for cosmetic claims.
Among other principles, product claims must be truthful, supported by adequate and verifiable evidence, and presented honestly.
The regulation also makes an important distinction: a claim based on an ingredient's properties must not imply that a finished cosmetic product has the same properties when it does not.
In practice, useful questions include:
- What benefit is being claimed? Smoother feel, improved combability, less breakage or something else?
- Was the finished product tested? An ingredient study is not necessarily evidence for the finished formulation.
- How was the effect measured? Laboratory fibre testing, instrumental measurements and consumer-reported experiences answer different questions.
- Under what conditions? Results may depend on hair condition, treatment frequency and the comparison used.
- How long is the effect expected to last? Temporary conditioning is not the same as permanent structural change.
This is not about rejecting cosmetic products. It is about recognising genuine benefits and avoiding conclusions that go beyond the evidence.
Making Better Product Choices for Your Hair
Curl classification can describe the visual pattern of hair, but product performance is also influenced by how the fibre behaves in daily life.
If your hair tangles easily, prioritise comfortable detangling and adequate slip. If it feels rough after frequent heat or chemical styling, consider the condition and processing history of the fibre. If a product consistently leaves unwanted deposits, reassess the overall routine rather than assuming that adding more layers will solve the problem.
Consider your scalp separately from the visible hair shaft: ongoing scalp irritation, unusual shedding or other concerning symptoms may require professional assessment rather than a new cosmetic product.
A useful routine is not necessarily the one with the most products. It is the one in which each product has a clear purpose.
The Takeaway: Real Benefits, Real Limits, Better Choices
Haircare products can cleanse, condition, improve slip, support styling and, with suitable formulations, change certain measurable characteristics of hair fibres.
They cannot make the visible hair shaft biologically heal, guarantee identical results for everyone or justify a finished-product claim simply because one ingredient has promising research behind it.
Understanding these limits does not make cosmetic science less exciting. It makes effective haircare easier to recognise.
At Melanin & Textures™, we believe knowledge helps you choose care with confidence.
Confidence Through Care™
Continue Exploring Hair Science
- Your Hair Has Layers: Understanding the Science Behind the Hair Fibre
- Can Damaged Hair Repair Itself?
- Hair Conditioners Explained
- Understanding Hair Porosity
Scientific References
- Cornwell, P. A. (2018). A review of shampoo surfactant technology: Consumer benefits, raw materials and recent developments. International Journal of Cosmetic Science, 40(1), 16–30. https://doi.org/10.1111/ics.12439
- Fernandes, C., Medronho, B., Alves, L., & Rasteiro, M. G. (2023). On hair care physicochemistry: From structure and degradation to novel biobased conditioning agents. Polymers, 15(3), 608. https://doi.org/10.3390/polym15030608
- Weiand, E., Rodriguez-Ropero, F., Roiter, Y., Angioletti-Uberti, S., Dini, D., & Ewen, J. P. (2025). Understanding and controlling the friction of human hair. Advances in Colloid and Interface Science, 345, 103580. https://doi.org/10.1016/j.cis.2025.103580
- Marsh, J. M., Whitaker, S., Felts, T., Cowans, C., Gupta, S., Masirevic, S., Fang, R., Simmonds, M. S. J., Chen, G., & Jiang, H. (2024). Penetration of oils into hair. International Journal of Cosmetic Science, 46(6), 905–917. https://doi.org/10.1111/ics.12978
- Gavazzoni Dias, M. F. R. (2015). Hair cosmetics: An overview. International Journal of Trichology, 7(1), 2–15. https://doi.org/10.4103/0974-7753.153450
- Commission Regulation (EU) No 655/2013 of 10 July 2013 laying down common criteria for the justification of claims used in relation to cosmetic products. Official text (EUR-Lex).