9+ Best Shampoo for Breaking Hair: Top Picks!


9+ Best Shampoo for Breaking Hair: Top Picks!

Hair breakage is a standard concern addressed by specialised cleaning merchandise. These formulations goal to strengthen the hair shaft, cut back friction, and enhance general elasticity, thereby mitigating harm. An instance can be a sulfate-free shampoo enriched with keratin and amino acids, designed to rebuild the protein construction of weakened strands.

Using these merchandise provides a number of benefits. They’ll considerably enhance hair’s manageability, cut back the looks of cut up ends, and promote more healthy development. Traditionally, people have sought treatments for fragile hair, with developments in beauty chemistry resulting in more and more efficient formulations focusing on the underlying causes of breakage.

The following sections will element key components to search for in an acceptable product, talk about software methods that decrease additional hurt, and supply steerage on integrating such a product right into a complete hair care routine.

1. Hydration

The presence of satisfactory moisture is paramount in mitigating hair breakage. Dehydrated hair loses elasticity, turning into brittle and vulnerable to wreck from styling, environmental components, and even routine dealing with. Subsequently, shampoos designed to handle breakage should prioritize hydration as a core operate. That is achieved by incorporating humectants, which draw moisture from the atmosphere into the hair shaft, and emollients, which seal in that moisture, stopping its speedy evaporation. For instance, shampoos containing components resembling aloe vera, glycerin, and shea butter exemplify this strategy, making a moisture-rich atmosphere that enhances hair’s pure resilience.

The number of a shampoo with efficient hydrating brokers considerably impacts hair’s structural integrity. Properly-hydrated hair can face up to better tensile power with out snapping, decreasing cut up ends and selling a smoother, more healthy look. Conversely, shampoos with harsh detergents can strip the hair of its pure oils, exacerbating dryness and rising the chance of breakage. Sensible software of this understanding entails fastidiously scrutinizing product labels for hydrating components and avoiding formulations with excessive concentrations of sulfates or alcohol, which might contribute to dehydration.

In abstract, hydration shouldn’t be merely a beauty enhancement however a elementary part in stopping hair breakage. A shampoo’s means to ship and retain moisture immediately correlates with its effectiveness in enhancing hair power and elasticity. Whereas different components resembling protein reinforcement and mild cleaning are necessary, hydration types the inspiration upon which these different advantages are constructed. The problem lies in figuring out formulations that present sustained hydration with out weighing the hair down or inflicting build-up, a stability usually achieved by a mix of humectants and light-weight emollients.

2. Protein Reinforcement

Protein reinforcement constitutes a vital facet of hair care, particularly when addressing breakage. The hair shaft is primarily composed of keratin, a protein that gives power and construction. Harm to this protein construction, whether or not from chemical therapies, warmth styling, or environmental stressors, weakens the hair, making it liable to breakage. Subsequently, merchandise designed to fight this problem usually incorporate components that assist to rebuild or reinforce this protein matrix.

  • Hydrolyzed Proteins

    Hydrolyzed proteins, resembling hydrolyzed keratin, wheat protein, or soy protein, are proteins which have been damaged down into smaller fragments. This course of permits them to penetrate the hair shaft extra simply, filling in gaps and reinforcing the inner construction. Shampoos containing hydrolyzed proteins can quickly enhance hair power and cut back breakage by offering constructing blocks for the broken keratin.

  • Amino Acids

    Amino acids are the basic models that make up proteins. Sure amino acids, like cysteine, are notably necessary for hair power as a result of they type disulfide bonds inside the keratin construction. These bonds contribute to the hair’s resilience. Shampoos that incorporate amino acids can assist to strengthen these bonds and fortify the hair shaft in opposition to breakage.

  • Keratin

    Keratin, the primary structural protein of hair, is ceaselessly added to shampoos focusing on breakage. The keratin can assist rebuild the hair’s outer protecting layer and fortify the inner construction, thereby diminishing brittleness and breakage. The efficacy is determined by the molecular measurement and formulation of the keratin inside the shampoo.

  • Protein-Moisture Steadiness

    Whereas protein reinforcement is important, sustaining a correct stability with moisture is equally necessary. Overloading the hair with protein with out satisfactory hydration can result in stiffness and elevated breakage. Subsequently, formulations should strike a stability between protein reinforcement and moisture replenishment to make sure the hair stays versatile and resilient. This stability is achieved by the concurrent use of protein-rich and moisturizing components.

In conclusion, the inclusion of protein-reinforcing brokers is crucial for shampoos geared toward decreasing hair breakage. The efficient use of hydrolyzed proteins, amino acids, and keratin, mixed with a give attention to sustaining the protein-moisture stability, is important for restoring hair power and stopping additional harm. The precise kind and focus of those proteins, together with the general formulation, will decide the shampoo’s efficacy in addressing breakage.

3. Mild Cleaning

Mild cleaning represents a cornerstone within the context of hair breakage prevention. The first function of shampoo is to take away filth, oil, and product buildup from the scalp and hair. Nevertheless, conventional shampoos usually comprise harsh surfactants that, whereas efficient at cleaning, can strip the hair of its pure oils, compromising the integrity of the hair shaft and exacerbating fragility. Within the realm of shampoos designed for breakage-prone hair, the crucial lies in reaching cleanliness with out sacrificing important moisture and lipids.

The cause-and-effect relationship is clear: harsh cleaning brokers result in dehydration, diminished elasticity, and elevated susceptibility to mechanical harm. Consequently, shampoos formulated for fragile hair prioritize milder surfactants resembling cocamidopropyl betaine or sodium lauroyl sarcosinate. These options supply adequate cleaning energy whereas minimizing moisture stripping. For instance, a person with chemically handled hair, already weakened, would profit considerably from a mild cleaning shampoo that preserves current hydration and reduces additional protein loss. The sensible significance is that deciding on a mild cleanser could be the distinction between hair that retains its power and hair that turns into more and more liable to breakage with every wash.

In abstract, light cleaning shouldn’t be merely a fascinating function however an indispensable part of an efficient anti-breakage shampoo. It permits for the elimination of impurities with out compromising the hair’s pure defenses, thereby contributing considerably to improved power, elasticity, and general well being. The continuing problem stays in formulating merchandise that strike the optimum stability between cleaning efficacy and preservation of hair’s pure moisture and lipid content material. This understanding is prime to creating knowledgeable product decisions and establishing hair care routines that help long-term hair well being.

4. Sulfate-Free

The absence of sulfates in hair cleaning formulations has turn into more and more important, notably within the pursuit of a product to handle hair breakage. Sulfates, generally used surfactants, can current challenges for sustaining hair integrity, particularly when hair is already weakened.

  • Minimized Moisture Stripping

    Sulfates, resembling sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES), are identified for his or her potent cleaning motion. This efficacy usually comes at the price of stripping the hair of its pure oils and moisture. For hair liable to breakage, which is usually already dry and fragile, this extreme elimination of moisture can exacerbate the issue, resulting in elevated brittleness and breakage. Sulfate-free shampoos, however, make the most of milder surfactants that cleanse the hair successfully with out severely depleting its moisture reserves.

  • Diminished Irritation

    Sulfates could be irritants to the scalp, notably for people with delicate pores and skin. This irritation can manifest as dryness, itching, and irritation, which might additional compromise hair well being and contribute to breakage. Sulfate-free formulations are typically gentler on the scalp, decreasing the chance of irritation and making a more healthy atmosphere for hair development. A more healthy scalp is healthier geared up to help sturdy, resilient hair.

  • Preservation of Hair Shade

    For people with color-treated hair, sulfate-containing shampoos can speed up shade fading. Sulfates can carry the hair cuticle, permitting shade molecules to flee extra readily. This not solely diminishes the vibrancy of the hair shade but additionally weakens the hair shaft, making it extra liable to breakage. Sulfate-free shampoos are much less prone to strip shade, serving to to extend the lifetime of the hair shade and keep hair power.

  • Enhanced Product Absorption

    By not depositing harsh chemical substances on the hair shaft, sulfate-free shampoos allow higher absorption of subsequent hair care merchandise, resembling conditioners and coverings. When the hair shouldn’t be coated with sulfate residue, it’s extra receptive to receiving the nourishing advantages of those merchandise, thus strengthening it from inside. This enhanced absorption contributes to improved hair well being and diminished breakage.

Subsequently, the adoption of a sulfate-free shampoo is ceaselessly a vital first step for people looking for to attenuate hair breakage. By mitigating moisture stripping, decreasing irritation, preserving hair shade, and enhancing product absorption, these formulations supply a gentler, extra nurturing strategy to hair cleaning, which helps general hair well being and resilience. Its additionally necessary to notice that whereas “sulfate-free” is a optimistic attribute, it must be thought-about along with different helpful components, resembling proteins and moisturizers, to realize optimum outcomes.

5. Keratin Infusion

The combination of keratin into shampoo formulations immediately addresses a main reason for hair breakage: the degradation of the hair’s protein construction. Keratin, a fibrous structural protein, constitutes the first part of hair. Harm, whether or not from chemical therapies, warmth styling, or environmental components, depletes keratin ranges, leaving the hair shaft weakened and vulnerable to fracture. Shampoos infused with keratin goal to replenish this misplaced protein, thereby reinforcing the hair’s structural integrity. This reinforcement interprets to enhanced elasticity and tensile power, decreasing the chance of breakage throughout routine styling and dealing with. For example, hair subjected to frequent bleaching experiences important keratin loss; a keratin-infused shampoo can assist to mitigate this loss, restoring among the hair’s unique resilience.

The effectiveness of keratin infusion hinges on a number of components, together with the dimensions of the keratin molecules used and the general formulation of the shampoo. Hydrolyzed keratin, which consists of smaller protein fragments, is usually most well-liked because it penetrates the hair shaft extra readily than bigger, intact keratin molecules. Moreover, the presence of complementary components, resembling moisturizing brokers and amino acids, can improve the advantages of keratin infusion by offering further help to the hair’s construction and stopping protein overload. Think about a shampoo that mixes hydrolyzed keratin with panthenol (a provitamin of B5); the keratin rebuilds the protein construction, whereas the panthenol supplies hydration, sustaining flexibility and stopping brittleness.

In abstract, keratin infusion represents a strategic strategy to combating hair breakage by immediately addressing protein loss and reinforcing the hair’s construction. Whereas the success of this strategy is determined by the standard and formulation of the keratin-infused shampoo, the basic precept stays sound: replenishing misplaced keratin contributes to stronger, extra resilient hair. The problem lies in figuring out merchandise that ship keratin successfully and keep a stability between protein reinforcement and moisture retention, guaranteeing that the hair is each sturdy and versatile.

6. Amino Acids

Amino acids are elementary constructing blocks of proteins, together with keratin, the first structural part of hair. Their presence in shampoo formulations designed to handle hair breakage relies on the necessity to reinforce and restore the hair’s protein construction, thereby enhancing its resilience and decreasing susceptibility to wreck.

  • Rebuilding Keratin Construction

    Amino acids, resembling cysteine, lysine, and arginine, contribute to the formation of disulfide bonds inside the keratin construction. These bonds present power and stability to the hair shaft. Shampoos containing a various array of amino acids can assist to replenish misplaced or broken amino acids, reinforcing the inner structure of the hair and enhancing its resistance to breakage. As an illustration, hair that has undergone chemical therapies usually suffers from amino acid depletion, making it extra fragile. The appliance of amino acid-rich shampoos can mitigate this harm by supplying the required constructing blocks for restore.

  • Moisture Retention and Humectancy

    Sure amino acids possess humectant properties, which means they appeal to and retain moisture. That is essential for stopping hair dryness, which is a serious contributing issue to breakage. Amino acids like serine and glycine assist to take care of the hair’s hydration ranges, stopping brittleness and selling flexibility. The inclusion of those amino acids in shampoo formulations designed for breakage-prone hair helps to make sure that the hair stays adequately moisturized, decreasing the chance of snapping and splitting.

  • Safety Towards Environmental Stressors

    Amino acids additionally supply a level of safety in opposition to environmental stressors, resembling UV radiation and air pollution. These stressors can harm the hair’s protein construction and contribute to breakage. Amino acids act as antioxidants, neutralizing free radicals and defending the hair from oxidative harm. The antioxidant properties of amino acids, mixed with their structural reinforcement capabilities, make them priceless components in shampoos formulated to fight hair breakage brought on by environmental publicity.

  • Scalp Well being and Nutrient Supply

    The well being of the scalp immediately impacts the well being of the hair. Amino acids play a job in sustaining a wholesome scalp atmosphere by selling blood circulation and nutrient supply to hair follicles. Enhanced circulation and nutrient availability help stronger hair development and cut back the chance of breakage on the root. Shampoos containing amino acids can contribute to general scalp well being, making a basis for sturdy, resilient hair. For instance, alanine and glutamine helps the hair follicles that’s the hair’s supply.

In conclusion, the combination of amino acids into shampoo formulations focusing on hair breakage is a multifaceted strategy that addresses each the structural and environmental components contributing to hair harm. By rebuilding keratin, retaining moisture, offering antioxidant safety, and selling scalp well being, amino acids play a essential position in enhancing hair power, decreasing breakage, and enhancing general hair well being.

7. Scalp Well being

The situation of the scalp immediately influences hair well being, making it a essential consider addressing breakage. A compromised scalp atmosphere can result in weakened hair follicles, impacting hair power and resilience. Consequently, shampoos designed to fight breakage should think about scalp well being as a main goal.

  • Nutrient Supply to Follicles

    A wholesome scalp helps environment friendly nutrient supply to hair follicles. Follicles require a gentle provide of nutritional vitamins, minerals, and proteins to provide sturdy, wholesome hair strands. A shampoo that promotes scalp circulation and removes obstacles to nutrient absorption can improve follicle operate, decreasing the chance of breakage. An instance is a shampoo containing components like caffeine or rosemary oil, identified to stimulate blood move to the scalp.

  • Sustaining pH Steadiness

    The scalp’s pH stability is crucial for preserving its protecting barrier. A disrupted pH can result in dryness, irritation, and irritation, all of which might weaken hair follicles. Shampoos which can be pH-balanced assist keep the scalp’s pure acidity, stopping these points and supporting a wholesome atmosphere for hair development. Shampoos with a pH degree between 4.5 and 5.5 are typically thought-about optimum for scalp well being.

  • Management of Sebum Manufacturing

    Sebum, the pure oil produced by the scalp, performs a vital position in moisturizing and defending hair. Nevertheless, extreme sebum buildup can clog follicles, whereas inadequate sebum can result in dryness. Shampoos formulated for a wholesome scalp assist regulate sebum manufacturing, guaranteeing that the scalp stays correctly moisturized with out turning into overly oily. Substances like tea tree oil can assist stability sebum ranges.

  • Minimizing Irritation and Irritation

    Irritation and irritation of the scalp can compromise follicle well being and contribute to hair breakage. Circumstances like dandruff, eczema, and psoriasis can disrupt the scalp’s pure stability, resulting in weakened hair. Shampoos containing anti-inflammatory components, resembling aloe vera or chamomile, can soothe the scalp and cut back irritation, making a more healthy atmosphere for hair development. A shampoo designed for delicate scalps ought to prioritize light cleaning and keep away from harsh chemical substances.

The aspects of scalp well being underscore the significance of choosing a shampoo that not solely strengthens the hair shaft but additionally nurtures the scalp. By selling nutrient supply, sustaining pH stability, controlling sebum manufacturing, and minimizing irritation, a shampoo designed for optimum scalp well being contributes considerably to the prevention of hair breakage. The choice standards ought to prolong past the rapid results on the hair strand to embody the broader influence on the scalp atmosphere.

8. Diminished Friction

Friction is a big contributor to hair breakage. Every strand encounters friction throughout washing, styling, and even sleeping, inflicting cuticle harm and weakening the hair shaft. Shampoos designed to attenuate breakage incorporate components that cut back this friction, thereby defending the hair’s structural integrity. For instance, hydrolyzed proteins and silicones create a smoother floor, lessening abrasive forces between strands. A shampoo missing such friction-reducing elements could inadvertently exacerbate harm, particularly in already fragile hair.

The sensible software of this understanding entails deciding on shampoos formulated with lubricating or smoothing brokers. These brokers type a protecting layer on the hair, decreasing the power required to comb or brush. That is notably related for people with textured or chemically handled hair, the place the cuticle is usually raised or broken, rising friction. Moreover, software methods, resembling utilizing a wide-tooth comb and avoiding vigorous towel drying, complement the results of friction-reducing shampoos, minimizing mechanical stress.

In abstract, decreasing friction is a elementary aspect in formulating shampoos for breakage-prone hair. The inclusion of lubricating components and the implementation of light dealing with practices are important in minimizing cuticle harm and preserving the hair’s power. The give attention to friction discount extends past rapid beauty enhancements, immediately influencing long-term hair well being and resilience. This understanding is crucial for people looking for efficient options to mitigate hair breakage.

9. UV Safety

Ultraviolet (UV) radiation poses a big menace to hair well being, contributing to protein degradation, moisture loss, and cuticle harm. Shampoos incorporating UV safety mechanisms deal with these vulnerabilities, providing a proactive strategy to stopping sun-induced hair weakening and subsequent breakage.

  • Minimizing Protein Degradation

    UV radiation can break down the protein construction of hair, notably keratin, resulting in diminished power and elasticity. UV-protective shampoo formulations comprise components that soak up or replicate UV rays, shielding the hair’s protein from damaging results. For instance, benzophenone-4 and ethylhexyl methoxycinnamate are widespread UV absorbers present in hair care merchandise. By preserving the hair’s protein integrity, these shampoos assist stop brittleness and breakage.

  • Stopping Moisture Loss

    Publicity to UV radiation can strip the hair of its pure oils and moisture, leading to dryness and elevated fragility. UV-protective shampoos usually embrace hydrating brokers and emollients that counteract this drying impact. These components type a barrier that seals in moisture and prevents its evaporation underneath solar publicity. As an illustration, shampoos containing shea butter or argan oil can assist keep hydration ranges whereas offering UV safety.

  • Defending Cuticle Integrity

    The hair cuticle, the outermost layer of the hair shaft, is especially weak to UV harm. When the cuticle is compromised, it turns into tough and porous, resulting in elevated friction and breakage. UV-protective shampoos assist keep cuticle integrity by forming a protecting layer that shields it from UV radiation. Substances like silicones can clean the cuticle and cut back friction, additional enhancing safety in opposition to breakage. Moreover, quinoa protein is a sort of hydrolyzed protein that may assist to guard hair from UV harm.

  • Combating Shade Fading

    UV publicity speed up shade fading for hair uncovered to coloring therapies, which additional weakens hair’s construction. This results in brittle hair, breakage, and cut up ends. UV-protective shampoos defend the hair from this harm, preserving the vibrancy and integrity of color-treated hair. Utilizing a UV-protective shampoo can prolong the lifetime of shade therapies whereas concurrently strengthening the hair and stopping breakage.

The inclusion of UV safety in a shampoo formulated to forestall hair breakage provides a complete strategy to sustaining hair well being. By minimizing protein degradation, stopping moisture loss, defending cuticle integrity, and preserving hair shade, these formulations assist safeguard hair in opposition to the dangerous results of solar publicity, contributing to stronger, extra resilient strands. Subsequently, UV safety is a priceless attribute in shampoos designed to handle breakage, notably for people who spend prolonged durations open air.

Continuously Requested Questions

This part addresses widespread queries concerning shampoo choice for hair liable to breakage, offering readability on product attributes and utilization.

Query 1: What components needs to be averted in a shampoo meant for breakage-prone hair?

Harsh sulfates, resembling sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES), needs to be averted. These can strip the hair of pure oils, rising dryness and fragility. Excessive concentrations of alcohol may dehydrate the hair shaft, exacerbating breakage. Merchandise containing extreme perfume or dyes can also trigger irritation, negatively impacting scalp well being and hair power.

Query 2: How usually ought to shampoo be used on hair that’s breaking simply?

Washing frequency needs to be minimized to keep away from extreme moisture stripping. Relying on hair kind and scalp oil manufacturing, shampooing two to 3 instances per week could also be applicable. Nevertheless, people with very dry or fragile hair could profit from washing solely as soon as per week, utilizing a cleaning conditioner (co-wash) on different days to take away buildup with out harsh detergents.

Query 3: Can a single shampoo get rid of hair breakage utterly?

No single shampoo can utterly get rid of hair breakage. Addressing breakage requires a complete strategy, together with light dealing with, warmth safety, a balanced weight loss plan, and probably skilled therapies. Whereas an acceptable shampoo can assist strengthen the hair and decrease additional harm, it is just one part of a broader hair care technique.

Query 4: Are costly shampoos essentially simpler at stopping breakage?

Worth shouldn’t be all the time indicative of effectiveness. Whereas some costly shampoos could comprise increased concentrations of helpful components or make the most of superior formulations, many reasonably priced choices supply comparable advantages. The bottom line is to scrutinize the ingredient checklist and choose merchandise that align with particular hair wants, no matter value level.

Query 5: How lengthy does it sometimes take to see outcomes from utilizing a shampoo designed for breakage?

Seen outcomes could range relying on the severity of the harm and particular person hair traits. Some enhancements, resembling elevated shine and manageability, could also be noticeable inside a number of weeks. Nevertheless, important strengthening and discount in breakage could take a number of months of constant use, mixed with different supportive hair care practices.

Query 6: Ought to conditioner even be used alongside a shampoo for breaking hair?

Conditioner is crucial, it may possibly assist restore hair’s moisture and elasticity, shield from warmth and environmental harm, detangle hair, and clean cuticles to replicate mild. Conditioners comprise cationic surfactants, oils, and silicones. It can also neutralize the destructive cost of the hair, cut back static electrical energy, and forestall fly-aways.

The correct product software is a key for hair strengthening.

The following part will discover complementary practices that increase the advantages of specialised shampoos, additional mitigating breakage and selling general hair well being.

Ideas for Maximizing the Advantages of Shampoo Formulated for Breakage-Inclined Hair

The next pointers will assist optimize the effectiveness of cleaning merchandise designed to mitigate hair breakage. Constant adherence to those suggestions can improve hair power and general well being.

Tip 1: Dilute Shampoo Earlier than Software: Concentrated shampoo could be overly harsh, even when sulfate-free. Diluting the shampoo with water in a separate container previous to software helps distribute the product extra evenly and reduces the potential for localized irritation.

Tip 2: Deal with Scalp Cleaning: Focus the shampoo software on the scalp, massaging gently to take away filth, oil, and product buildup. Keep away from extreme rubbing or scrubbing of the hair shaft, as this will contribute to friction and breakage. The shampoo will naturally cleanse the hair as it’s rinsed by the lengths.

Tip 3: Use Lukewarm Water: Sizzling water can strip the hair of its pure oils, exacerbating dryness and fragility. Rinse the shampoo out with lukewarm water to attenuate moisture loss and protect the hair’s integrity.

Tip 4: Apply Conditioner Strategically: Conditioner is crucial to switch moisture eliminated throughout cleaning. Focus the appliance on the mid-lengths and ends of the hair, avoiding the scalp to forestall buildup and keep quantity. Go away the conditioner on for the really helpful time to permit for optimum hydration and detangling.

Tip 5: Detangle Gently After Conditioning: Whereas the hair continues to be coated with conditioner, use a wide-tooth comb to softly detangle, ranging from the ends and dealing upwards. This minimizes breakage by decreasing friction and pulling on knots. Keep away from utilizing brushes on moist hair, as they will trigger extra harm.

Tip 6: Blot Hair Dry, Do Not Rub: After rinsing out the conditioner, gently blot the hair dry with a smooth microfiber towel or t-shirt. Keep away from rubbing vigorously, as this will disrupt the cuticle and result in frizz and breakage.

Tip 7: Use a Go away-In Conditioner or Serum: Making use of a leave-in conditioner or serum after washing supplies an additional layer of safety and hydration. These merchandise assist to seal the cuticle, cut back frizz, and shield the hair from environmental stressors.

Constant adherence to those shampooing methods can maximize the advantages of a shampoo formulated for breakage. This helps improved hair well being and minimizing additional harm.

The next part will summarize the important thing issues and supply concluding remarks.

Conclusion

This text has explored essential components in deciding on the optimum cleaning product to mitigate hair breakage. Key issues embrace prioritizing sulfate-free formulations, incorporating protein reinforcement by keratin and amino acids, guaranteeing light cleaning motion, and offering satisfactory hydration. Extra advantages come up from UV safety and components that promote scalp well being and cut back friction.

Addressing hair breakage requires a multifaceted strategy. Selecting an applicable shampoo represents a foundational step in a complete hair care technique. Constant consideration to product choice, correct software methods, and complementary practices will contribute to improved hair power, resilience, and general well being. People are inspired to implement the insights provided to make knowledgeable decisions and set up efficient routines for sustaining wholesome, breakage-resistant hair.