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Which of the following affects hair porosity and condition?

Hair porosity and condition are determined by many factors. The composition, structure, and health of hair can be influenced by elements like genetics, weather, hair care routines, chemical treatments, nutrition, and health conditions. Understanding what impacts hair porosity and condition allows us to take better care of our hair. In this comprehensive guide, we will examine various factors that affect the porosity and condition of hair.


Genetics play a major role in determining natural hair porosity, texture, density, and growth rate. Ethnic background influences the shape of the hair shaft and the composition of hair keratin. Those of African descent tend to have curlier hair with more fragility, while Asian hair is usually straight and more resilient.

The quantity and distribution of melanin also affects hair porosity. More melanin leads to lower porosity. Hair follicles produce less melanin as we age, increasing porosity and graying. Genetic conditions like alopecia areata can affect hair density and growth cycles. While we cannot alter our genetics, we can select hair care methods suitable for our hair type.

Weather and Environment

External factors like humidity, heat, and cold impact hair condition and porosity. The moisture and oils in hair expand in high humidity, causing swelling and frizz. Very dry climates can draw moisture from hair, leaving it brittle and porous. UV rays from the sun damage hair over time by depleting protein and lipids.

Pollution is another environmental factor that may coat and corrode hair. Swimming in pools with chemical treatments like chlorine can strip hair of oils and alter pH. Some water sources contain high mineral content that builds up on hair, requiring clarifying treatments. Being aware of environmental hair stressors allows us to take protective measures like covering hair, deep conditioning, and gentle cleansing.

Hair Care Routines

Our hair care practices affect condition and porosity for better or worse. Overuse of alkaline shampoos can degrade hair proteins and cause swelling. Excessive heat styling and brushing adds mechanical damage. However, a customized hair care regimen can improve hair health.

Hair Care Habits Potential Impact on Hair
Infrequent shampooing Product buildup, oiliness, dirt
Daily or aggressive shampooing Stripped oils, dryness, frizz
Silicone-heavy conditioners Coating, limpness, weigh-down
Weekly deep conditioning Improved strength, shine, manageability
Heat tools daily without protectant Brittleness, dryness, breakage
Sleeping on cotton pillowcases Friction damage, kinks, tangles
Using microfiber towel to dry Reduced frizz and friction
Brushing wet hair Increased breakage risk
Using seamless combs, not brushes Minimized breakage

As shown in the table, thoughtful hair care habits like limiting heat tools, deep conditioning, air drying, and using protective styles can improve hair health and condition over time.

Chemical Services

Chemical hair treatments often damage the hair cuticle, causing changes to texture, porosity, elasticity, and function over time.

Treatment Effects on Hair
Perms Alters bonds for curl; oxidation damage
Relaxers Breaks bonds to straighten; depletes moisture
Coloring Oxidation; cuticle opening; dehydration
Bleaching Removes pigment; significant protein loss
Keratin treatments Smooths cuticle; may cause buildup

The use of chemical services causes cumulative damage over time, especially when paired with heat. However, protective measures like Olaplex, conditioning, and gradually spacing out treatments can mitigate adverse effects. Those who chemically treat their hair must be vigilant about moisturizing and strengthening it.

Diet and Nutrition

Hair is a living structure that requires nutrients for optimal health. Deficiencies in certain vitamins, minerals, and compounds can negatively affect hair condition.

Nutrients Effects on Hair
Protein Needed for strong keratin structures
Iron Enables hair follicle growth
Zinc Boosts follicle health
Vitamin D Stimulates growth phase
Omega-3 fatty acids Provides moisture, shine
Biotin Supports thickness and strength

Ingesting a balanced diet rich in vitamins A, B, C, D, E, iron, zinc, biotin, and essential fatty acids promotes optimal hair growth and resilience. Staying hydrated is also key. Nutrient deficits can lead to issues like excessive shedding, thinning, and a dry, brittle texture.

Health and Medical Conditions

Our overall health impacts the condition of our hair. Illnesses that cause prolonged fever, chronic stress and anxiety, autoimmune disorders, hormonal imbalances, and nutritional deficits may disrupt the hair growth cycle and integrity. Some examples include:

Condition Hair Symptoms
Thyroid disorders Hair thinning, increased shedding
Anemia Hair loss, fragile hair
Alopecia areata Patches of hair loss on the scalp
Lupus Hair thinning, redness, sores
Diabetes Slow growth, shedding

Issues like postpartum hormone shifts and menopause can also disrupt the hair growth cycle. Being aware of how medical conditions impact hair can help us be proactive about prevention and treatment. Consulting a doctor helps diagnose and manage underlying issues.

Age and Aging

Aging is an unavoidable factor that changes hair texture and growth over time. Hair tends to become drier, thinner, and more porous as we get older. The aging process causes:

– Slower cell turnover rate in follicles
– Decreased circulation to the scalp
– Decline in hormone levels like estrogen
– Oxidation damage from free radicals

These effects lead to stalled growth phases, increased shedding and thinning, graying, and altered curl patterns. While we cannot stop aging, we can delay its effects on hair through scalp massages, diet, and the use of thickening treatments and volumizing products as needed. Being gentle with hair is also recommended as older hair is more fragile.


In summary, hair porosity and overall condition are influenced by many internal and external factors. Genetics establish the base but elements like weather, hair routines, chemical treatments, health status, and aging also play significant roles.

Being aware of how different factors impact the hair allows us to make educated decisions about hair care. We can utilize protective practices, nutrition, and treatments tailored to our hair’s needs. Though some factors are beyond our control, knowledge empowers us to proactively maintain healthy, resilient hair as long as possible. A holistic approach addresses hair health from all angles.

While genetics determine characteristics like curl pattern, many factors that affect the quality and integrity of hair can be managed. Making strategic tweaks to our routines, diet, and lifestyle promotes strong, shiny hair regardless of porosity and innate texture. Consult a dermatologist or trichologist to diagnose issues and get science-backed recommendations for your specific hair needs. With smart customized care, we can enhance hair health despite the challenges posed by the environment, chemical treatments and the natural aging process.