Healthy Hair and Scalp

Healthy Hair and Scalp

Healthy Hair and Scalp
Want some expert tips on how to maintain your healthy head of hair? First, you can start with good nutrition. By eating two to three servings of protein a day you can maintain a normal hair growth cycle. Wear wide-brimmed hats when you’re outside to protect your scalp from sunburn and sun damage. Other ways to maintain and care for your hair include proper styling tools and hair care products that won’t damage and over-dry your hair. Read on for more hair secrets and advice from our team of experts.

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    A , Cardiology (Cardiovascular Disease), answered
    Hair is great for running your fingers through and growing make-a-statement goatees, but having hair was once far more purposeful than simply serving as bodily ornamentation. For early humans, hair kept them warm, protected them from cuts and scrapes, provided camouflage, and even served as a nice handhold for the young. They were much hairier than modern humans, and the reason that we lost a lot of body hair over time isn't because we invented heaters and parkas. More likely, our ancestors started hunting in hot, tropical areas -- and bare skin adds to the efficiency of our cooling system. The reason why we kept the tuft at the top? Many experts agree that it had to do with a mating ritual that went a little something like this: The male with the most impressive hair -- or he who could make it look that way -- frightened away his rivals, got his girl, and fathered the next generation. Hence, head hair played a major role in obtaining a partner and successfully producing offspring.

    Today, our hair still performs many useful functions, in addition to keeping barbers employed. The hair on our scalps protects us against the sun, and our eyelashes act as our first defense against bugs, dust, and other irritating objects. In the phase of human development when our ancestors had lost their full-body follicular coverage but clothes were still as scarce as skyscrapers, the hair in our nether regions camouflaged our reproductive parts from generation-threatening spears. And by lining our armpits -- we docs call this the axilla -- and groins, our dry hair actually acts as a lubricant, allowing our arms and legs to move without chafing.

    Also, both then and now, our body hair serves as a protector against malaria. The Anopheles mosquito -- a low-flying bug that likes the legs -- hates hair, in part because hair warns its victim to start swatting. While their bite is painless, our hair signals the presence of mosquitoes before they bite (it's why kids are at greater risk -- they have less hair on their legs). That's most likely the original purpose of hair: it served as an early warning system of bodily threats. We seem to ignore the armor function of our hair today, removing it every chance we get, except on our heads and eyes.
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    A , Cardiology (Cardiovascular Disease), answered

    If you're counting, you either have very little hair or are in a desperate need for a hobby. The average person's head has up to 150,000 hair follicles (the entire adult body has 5 million). That number is constant over a lifetime; it's hereditary, so only the thickness of your hair, its condition, and whether you lose the actual strands that come from those follicles can change.

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    A , Internal Medicine, answered

    On an average, you lose 50 to 200 hairs a day. Any guess as to when we have the most hair follicles? Age 18, you say? Bzzzz, try again. It's when we're in week 22 as a fetus; that's the largest number we'll ever have, since we don't generate new follicles as we age.

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    A , Internal Medicine, answered
    Smoker Silhouette

    If you've ever wondered why you can't shake the cigarette smell after spending time in a smoke-filled room (or with a few heavy-puffing friends), it's because your hair acts like a paper towel - it's absorbent. And hair also often has a mild electric charge, particularly in very low humidity, and this can attract charged pollutant particles. So in a nutshell, your hair takes the stink from the air, and brings it home with you. This is a time to shampoo, as the toxins in smoke are harmful to your hair.


    Smoker Silhouette
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    A , Internal Medicine, answered
    Some people have difficulty growing their hair beyond a certain length because they have a short active phase of growth. On the other hand, people with very long hair have a long active phase of growth. The hair on the arms, legs, eyelashes, and eyebrows have a very short active growth phase of about 30-45 days, explaining why they are so much shorter than scalp hair. Transplanted hair doesn't know it's in a new location and so eyelash transplants from the scalp need to be trimmed every few weeks to avoid looking like a tarantula.

    By the way, while men tend to prefer women with long hair (ever see a painting of Eve with a buzz cut?), women, especially as they age, seem to prefer wearing shorter hair. After all, long hair on a mature, sophisticated woman can seem about as appropriate as shoveling soup with your fingers. More importantly, our hair tells us a ton about our overall health status, as the growth or loss of hair can signal other malfunctions going on inside of our bodies.
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    A , Internal Medicine, answered

    A certain species of monkeys have patches of hair on their heads very similar to humans; they develop during puberty and are found only among the males. In evolutionist language this is called epigamic hair, which means that it is a sign of sexual dominance. The lion's mane is an example of epigamic hair, as it's used as a scare technique during sexual fighting.

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    A , Cardiology (Cardiovascular Disease), answered

    In addition to its utilitarian functions, hair reflects a lot about our self-esteem, taste, gender, age, and attitude. It also plays a major role in how we're attracted and become attractive to other people In fact, women's hair is considered so sexually provocative that in many cultures it is concealed after marriage for fear of inciting uncontrollable desires. In the first century, a married Roman woman could be divorced for uncovering her head. To this day, Muslim women and orthodox Jewish women, once married, cover their hair with a kerchief or scarf, or wear a wig.

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    A , Cardiology (Cardiovascular Disease), answered

    Hair gets oily as the result of sebum excretion from the sebaceous glands. These glands are found most abundantly on the scalp and face and are usually attached to hair follicles. As the sebum travels up the hair, it waterproofs and moisturizes it and the skin.

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    A , Administration, answered

    Pubic hair protects, cushions, and prevents irritation during sexual intercourse.

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    A , Cardiology (Cardiovascular Disease), answered
    Adult stem cells exist in almost every tissue in the body, including the hair follicle cells. Wherever they are, stem cells stimulate the regeneration and repair of tissue. Some researchers are experimenting with ways to stimulate hair follicle stem cells to promote hair growth, or, in cases of excess hair growth, to inhibit it.
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