Hair Facts

Hair Facts

What is the lifespan of a hair?

The lifespan of a hair is 2 to 7 years.

What is the diameter of a hair?

The diameter of a hair is approximately 0.1 millimeters.

How long will hair grow?

The maximum length of a hair is approximately70 to 90 centimeters.

How fast does hair grow?

Hair is the second fastest growing tissue in the body. Only bone marrow grows more quickly. Normal annual growth is approximately 12 centimeters. 35 meters of hair fiber is produced every day on the average adult scalp. At any one time, 90% of scalp hairs are growing while 10% are resting.

What is the average number of hairs on a person’s head?

The average number of hairs on a scalp is 100,000 – red hair averages 90,000, black hair averages 110,000 and blond hair averages 140,000.

Will cutting hair cause it to grow faster?

Cutting hair influences hair growth by trimming and strengthening broken ends to reduce breakage and allow hair to appear to grow faster.

Is it better to comb or brush your hair?

Combing is less detrimental than brushing.

What foods promote healthy hair?

Eating eggs, liver, kidneys, herring, salmon and wholemeal foods supports healthy hair growth. Eating carrots, green vegetables and foods rich in Vitamins C and D also promotes healthy hair growth.

How does normal aging affect hair?

Older people experience slower hair growth and diminished hair density.

How does gender affect hair?

Male hair is more dense and grows more quickly than female hair? (It figures!) Hair loss is universal. Male and female pattern baldness affects 35 million men and 21 million women in the United States alone.

Will frequent washing increase hair loss?

No, frequent washing does not increase hair loss and correct shampooing will not dry out hair.

What exactly is hair loss?

Normal hair sheds between 100 and 125 strands per day. Hair loss occurs when daily hair loss exceeds the normal range or is not replaced with new hair. You must lose over 50% of your scalp hairs before it is apparent to anyone.

What are some of the non-genetic causes of hair loss?

Physical stress – some examples are surgery, major illness, or rapid weight loss.
Emotional stress – some examples are mental illness, death of a loved one, job loss.
Medications – some examples are blood pressure medication, high doses of Vitamin A, some gout medications, chemotherapy and radiation.
Hormonal changes – some examples are pregnancy, birth control pills and menopause.
Improper hair care – some examples are dying, tinting, bleaching, straightening and excessive styling that pulls the hair too tightly.
Improper Nutrition – two examples are insufficient protein and iron in the diet.

What are some of the illnesses that can cause hair loss?

Alopecia, Hyper Thyroid, Lupus and Cancer are all illnesses that can cause hair loss, either from the disease itself or from the treatment. Thyroid imbalance and iron deficiency are reversible causes of hair loss.

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