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How to determine the degree of hair damage

Healthy Hair: A Rarity in Modern Life

Healthy hair is a rarity in our reality. Frequent coloring, the use of styling products, poor environmental conditions, an unbalanced diet, and harmful habits all affect the health and appearance of the hair. Even with a carefully selected care routine, it can be difficult to eliminate dryness, brittleness, and dullness. In such cases, a professional can help by assessing the level of hair damage and selecting appropriate treatments or restorative cosmetics.

Below, we explain how hair damage is diagnosed and classified.

How to Assess Hair Quality: Professional Methods

Hair is made up of 90% keratin, lipids, natural pigments, and moisture compounds. Under a microscope, the structure of a hair strand resembles that of wood. The inner part is covered by the cortex, while the outer layer consists of hardened keratin cells. To assess hair elasticity, professionals use a microscope and collect the necessary information.

Collecting Client Hair Data
Since hair grows at different rates for everyone, the specialist will ask questions to determine this—how often the client trims the ends, what type of dye and developer are used. Information is also gathered on past bleaching, chemical treatments (e.g., Botox, keratin, nanoplastia, lamination, etc.).
Visual Analysis of Hair Strands
The professional evaluates the quality of the coloring. If the hair is unevenly dyed, they may take steps to even out the pigment before applying any new color. The ethnic hair type (Afro, Asian, or Slavic) is also considered—this helps assess porosity before performing color or treatment services.
Hair Washing Step
The stylist washes the entire head or a single strand with a deep cleansing shampoo. This removes buildup and reveals hair characteristics that may not have been visible earlier.
Drying Without Styling Tools
Letting a strand air dry without using a brush, blow-dryer, or styling products helps reveal the natural condition of the hair.
Elasticity, Porosity & Curl Strength Tests
These physical tests help assess the hair’s resilience and structure.

Based on the gathered data, the specialist can diagnose the level of hair damage.

5 Levels of Hair Damage

Level 1 – Healthy Hair
No chemical treatments or coloring. Hair is shiny, strong, and passes the elasticity test without stretching.
Level 2 – Minor Damage
Symptoms include dryness, split ends, and dullness.
Level 3 – Moderate Damage
Usually caused by bleaching with a 3% oxidant. Restorative treatments are needed to repair structural weakness.
Level 4 – Significant Damage
Ends are visibly dry, lack shine, and stretch during the elasticity test.
Level 5 – Severe Damage
Hair stretches excessively and does not return to its original shape. The structure is severely compromised.

Why keratin did not give an instant effect: the main reasons

Why Keratin May Not Straighten Your Hair: Causes and Key Considerations

Keratin hair straightening allows even the coarsest and most unruly curls to become perfectly smooth and shiny for an extended period—without the use of styling products. Thanks to its long-lasting effect and the beautiful, polished look it creates, the procedure has gained worldwide popularity and remains one of the top salon services. However, sometimes keratin treatments don't deliver the desired results. Below, we explore the main reasons why keratin may fail to straighten hair effectively.

Keratin Benefits and Duration of Results

The uniqueness of keratin lies in its ability to straighten hair of any type for a long time. This is achieved by applying a keratin-based formula that fills gaps in the hair shaft, smoothing and sealing the cuticle.

What to expect after the first keratin treatment?
When the procedure is performed correctly, hair becomes straight, smooth, shiny, and silky. With proper at-home care, the effect can last up to 5 months.

Key benefits of keratin treatment:

Long-lasting styling effect without flat ironing
Intense shine and smoothness
Hair appears thicker and denser
Easier combing and detangling

Keratin drawbacks:
The main disadvantages are its high cost and the lack of true repair—the structure of the hair is not restored, but the visual appearance improves significantly.

Why Keratin Doesn’t Work: Common Mistakes

Several reasons can explain why keratin treatments may fail:

Incorrect hair diagnosis, including elasticity and hair type (e.g., ethnic hair types).
Wrong product formulation chosen due to misdiagnosis. For example, if Afro-textured hair is not identified correctly, a formula that’s too weak may be used, resulting in poor straightening.
Improper application technique – the product must be evenly distributed in sufficient quantity to penetrate the cortex and ensure effectiveness.
Insufficient processing time – depending on the hair’s thickness and type, the formula must be left on for the correct amount of time to work effectively but safely.
Incomplete drying before ironing – hair must be thoroughly dried before sealing the product with a flat iron. Residual moisture can prevent proper results and cause the hair to curl again.
Using the wrong flat iron – if the iron doesn’t reach the required temperature or distribute heat evenly, the cuticle won’t be sealed properly, causing the keratin to wash out quickly.
Rinsing the treatment out too early – hair may appear greasy after keratin application, leading some clients to wash it out prematurely. This prevents the product from working fully.
Incorrect post-treatment care – to maintain the results for up to 5 months, it’s essential to use sulfate-free shampoos and conditioners, as well as keratin-enriched masks that prolong the smoothing effect and help retain protein in the strands.
Improper care during the first days after the procedure – tying the hair back or clipping it too soon can leave dents and cause waves to return. That’s why it’s crucial that the stylist provides clear aftercare instructions to ensure optimal results.

You can find professional at-home care products for post-keratin treatment in our online store, and explore our blog for more information on how keratin works and who it is best suited for.

Why you need heat protection for your hair

Why You Need Heat Protection for Your Hair: Benefits, Composition, and Application

Daily hair styling, straightening, and curling are part of many women’s everyday routines. However, this flawless look comes at a cost — the health of your hair. Constant exposure to high temperatures makes strands dry, brittle, and dehydrated, stripping them of their natural shine. Heat protection products are essential to neutralize the negative effects of styling tools. Below, we explain why heat protection is important and how to choose the right product.

Heat Protection for Hair: Ingredients and Application

Heat protection products come in various formats. They are generally leave-in conditioners designed to be applied to clean, damp or dry hair before styling. The product is spread evenly along the entire length of the hair, including the ends, to create a protective coating around each strand.

The exact chemical formula may vary, but typical key ingredients include:

A variety of silicones
Ethanol (ethyl alcohol)
Additional components that ensure the product rinses off easily, gives a pleasant scent, and creates a lightweight texture for easy application

Why is it essential to use heat protection if you regularly use styling tools?
Because hot air from a blow-dryer or the direct heat of flat irons causes rapid dehydration, leaving hair dry and damaged. When applied and distributed correctly, heat protectants form an invisible, waterproof layer over each hair shaft. This film acts as a shield during heat exposure — absorbing the heat instead of allowing it to reach the hair’s cuticle layer. During styling, some silicones and alcohol evaporate, but the protective layer helps prevent the moisture inside the hair from boiling, thus preserving the natural water balance within the strand.

When is heat protection necessary?
It’s especially important at the seaside, where hair is exposed to hot wind, salty water, and intense sunlight. Heat protectants help prevent moisture loss from the cuticle so that your hair remains hydrated and shiny after vacation.

Heat protection is also essential in summer, when high temperatures and UV rays can severely damage your strands — as well as in winter, when cold, wind, and moisture can be just as harmful.

How to Choose the Right Heat Protectant?

There’s no single answer to the question: Which heat protection product is best? The ideal choice depends on your hair type and preferences, so it’s a good idea to read reviews and try different options:

Spray heat protectant – applied with a spray bottle, allowing light and even coverage
Leave-in cream or emulsion – dispensed from a pump or tube for more targeted application
Oil-based emulsion – offers deeper nourishment and shine

You can find a wide selection of heat protection products in the KeratinMall online store, including options from top professional brands.

What you need to know about botox for hair: 10 facts

Healthy Hair: A Rarity in Modern Life

Healthy, undamaged hair is a rarity in today’s reality. Frequent coloring, use of styling products, poor environmental conditions, an unbalanced diet, and harmful habits all take a toll on the health and appearance of the hair. Even with properly selected care, it can be difficult to eliminate dryness, brittleness, and dullness. In such cases, a professional can help by assessing the degree of damage and recommending restorative treatments or products.
Below, we’ll explain how hair damage is diagnosed and classified.

How to Assess Hair Quality: Professional Methods

Hair is made up of about 90% keratin, lipids, natural pigments, and moisture-binding compounds. When examined under a microscope, hair resembles the structure of wood. The inner part is covered by a layer of cortex, while the outer shell consists of keratinized (hardened) cells.
How is hair elasticity tested?
A specialist uses a microscope and gathers all the necessary information through the following steps:

Gathering client hair data.
Since everyone’s hair grows at different rates, the professional will ask how often the client trims their ends, what hair dye and developer they use. Information is also collected about past intense color treatments, chemical perms, and procedures such as hair Botox, keratin, nanoplastia, lamination, etc.
Visual analysis of hair strands.
The specialist inspects the strands to assess color quality. If the color is uneven, corrective steps may be taken to balance the tone before applying pigment. The ethnic hair type (Afro, Asian, Slavic) is also considered—this helps determine porosity when preparing for coloring or restorative procedures.
Washing with a deep cleansing shampoo.
The stylist washes either the whole head or at least one strand. Rinsing off any product residues reveals additional data about the hair that may not have been previously visible.
Air drying without styling.
A strand is dried without a comb, brush, or any styling product. This helps show the hair's natural condition.
Testing for elasticity, porosity, and curl strength.
These tests help determine the hair’s structural integrity.

Based on the gathered data, the professional determines the degree of hair damage.

The 5 Levels of Hair Damage

Level 1 – No Damage
Hair has never been colored or chemically treated. It looks healthy, shiny, and does not stretch during the elasticity test.
Level 2 – Mild Damage
Signs include dryness, split ends, and dullness.
Level 3 – Moderate Damage
Often caused by lightening with a 3% peroxide developer. Restorative products can address the resulting issues.
Level 4 – Advanced Damage
Visibly dry ends that don’t reflect light and stretch when tested for elasticity.
Level 5 – Severe Damage
Hair strands stretch significantly and do not return to their original shape, indicating extreme structural breakdown.

Felps.shop

How to determine the degree of hair damage

Below, we explain how hair damage is diagnosed and classified.

How to Assess Hair Quality: Professional Methods

Hair Washing Step
The stylist washes the entire head or a single strand with a deep cleansing shampoo. This removes buildup and reveals hair characteristics that may not have been visible earlier.

Drying Without Styling Tools
Letting a strand air dry without using a brush, blow-dryer, or styling products helps reveal the natural condition of the hair.

Elasticity, Porosity & Curl Strength Tests
These physical tests help assess the hair’s resilience and structure.

Based on the gathered data, the specialist can diagnose the level of hair damage.

5 Levels of Hair Damage

Level 1 – Healthy Hair
No chemical treatments or coloring. Hair is shiny, strong, and passes the elasticity test without stretching.

Level 2 – Minor Damage
Symptoms include dryness, split ends, and dullness.

Level 3 – Moderate Damage
Usually caused by bleaching with a 3% oxidant. Restorative treatments are needed to repair structural weakness.

Level 4 – Significant Damage
Ends are visibly dry, lack shine, and stretch during the elasticity test.

Level 5 – Severe Damage
Hair stretches excessively and does not return to its original shape. The structure is severely compromised.

Why keratin did not give an instant effect: the main reasons

Keratin Benefits and Duration of Results

Why Keratin Doesn’t Work: Common Mistakes

Why you need heat protection for your hair

Why You Need Heat Protection for Your Hair: Benefits, Composition, and Application

Heat Protection for Hair: Ingredients and Application

How to Choose the Right Heat Protectant?

What you need to know about botox for hair: 10 facts

How to Assess Hair Quality: Professional Methods

The 5 Levels of Hair Damage

Felps.shop

How to determine the degree of hair damage

Below, we explain how hair damage is diagnosed and classified.

How to Assess Hair Quality: Professional Methods

Hair Washing StepThe stylist washes the entire head or a single strand with a deep cleansing shampoo. This removes buildup and reveals hair characteristics that may not have been visible earlier.

Drying Without Styling ToolsLetting a strand air dry without using a brush, blow-dryer, or styling products helps reveal the natural condition of the hair.

Elasticity, Porosity & Curl Strength TestsThese physical tests help assess the hair’s resilience and structure.

Based on the gathered data, the specialist can diagnose the level of hair damage.

5 Levels of Hair Damage

Level 1 – Healthy HairNo chemical treatments or coloring. Hair is shiny, strong, and passes the elasticity test without stretching.

Level 2 – Minor DamageSymptoms include dryness, split ends, and dullness.

Level 3 – Moderate DamageUsually caused by bleaching with a 3% oxidant. Restorative treatments are needed to repair structural weakness.

Level 4 – Significant DamageEnds are visibly dry, lack shine, and stretch during the elasticity test.

Level 5 – Severe DamageHair stretches excessively and does not return to its original shape. The structure is severely compromised.

Why keratin did not give an instant effect: the main reasons

Keratin Benefits and Duration of Results

Why Keratin Doesn’t Work: Common Mistakes

Why you need heat protection for your hair

Why You Need Heat Protection for Your Hair: Benefits, Composition, and Application

Heat Protection for Hair: Ingredients and Application

How to Choose the Right Heat Protectant?

What you need to know about botox for hair: 10 facts

How to Assess Hair Quality: Professional Methods

The 5 Levels of Hair Damage

Hair Washing Step
The stylist washes the entire head or a single strand with a deep cleansing shampoo. This removes buildup and reveals hair characteristics that may not have been visible earlier.

Drying Without Styling Tools
Letting a strand air dry without using a brush, blow-dryer, or styling products helps reveal the natural condition of the hair.

Elasticity, Porosity & Curl Strength Tests
These physical tests help assess the hair’s resilience and structure.

Level 1 – Healthy Hair
No chemical treatments or coloring. Hair is shiny, strong, and passes the elasticity test without stretching.

Level 2 – Minor Damage
Symptoms include dryness, split ends, and dullness.

Level 3 – Moderate Damage
Usually caused by bleaching with a 3% oxidant. Restorative treatments are needed to repair structural weakness.

Level 4 – Significant Damage
Ends are visibly dry, lack shine, and stretch during the elasticity test.

Level 5 – Severe Damage
Hair stretches excessively and does not return to its original shape. The structure is severely compromised.