There are so many things to worry about when it comes to ageing and unfortunately your once thick and lustrous hair is one of them.

Aging may naturally mean losing hair and gaining grays, but overexposure to things like the sun, crash dieting, hair extensions and chemical treatments can all take a toll on our locks, says hair expert Dr. Alan Bauman of Bauman Medical Group in Florida.

An estimated 40 to 50 per cent of men and women will suffer from hair loss by age 50, while the number of hair transplants have climbed by 42 per cent since 2007, according to the International Society of Hair Restoration Surgery.

But along with the facts also come the myths. For years, people have believed in old wives' tales about hair growth and hair loss, and Bauman says he's heard everything from blaming the mother's side, hats causing baldness and even myths about how dead follicles can grow back into shiny healthy hair.

And although pattern baldness is more common for men, women can experience similar hair loss from the crown of their head if they have nutritional deficiencies, imbalanced hormones and even if they've undergone rapid weight loss, according to Huffington Post Canada blogger and naturopathic doctor Natasha Turner.

And while we can't stop our hair from going gray or thinning, there are natural ways to keep our hair healthy. Eating the right foods like salmon, dark green vegetables and beans for example, all promote healthier and stronger hair, Bauman says.

LOOK — 10 of the most common facts and fiction you hear about hair loss:

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  • Overexposure To The Sun Causes Hair Loss

    <strong>FALSE BUT SOMEWHAT TRUE</strong> Ultraviolet (UV) radiation can cause skin problems like accelerated aging and cancer, but it will not interrupt hair follicle function, says hair expert <a href="http://www.baumanmedical.com/Default.aspx?tabid=93" target="_hplink">Dr. Alan Bauman</a> of Bauman Medical Group in Florida. However, overexposure of hair fibres to UV radiation can in fact weaken the fibres, disrupt the cuticle and make them more prone to dullness, frizz and breakage.

  • Pluck One Grey Hair And Two Grow Back

    <strong>FALSE</strong> The good news is pulling out grey hairs won't make more grow back. The bad news is most people get grey hair as they age anyway.

  • Over-Shampooing Can Make You Lose Hair

    <strong>FALSE</strong> Many people may notice they shed daily after they shampoo or brush their hair. "Hair follicles cycle on and cycle off and repeat that process over the course of their life span," says Bauman. Each day 100 to 200 hairs shed and these hair follicles are replaced by other hair follicles entering the growth phase.

  • Standing On Your Head Makes Your Hair Grow

    <strong>FALSE</strong> It may sound funny, but this is a commonly heard myth. Bauman says hair loss is not a blood flow problem, but instead can be caused by other factors like age and genetics. "Even if increased blood flow helped hair growth, you could not stay in that position long enough to have an effect on the hair follicles," Bauman says.

  • Balding Is Linked To Old Age

    <strong>TRUE</strong> Genetic male and female hair loss gets more common as we age. However, another type of hair loss <a href="http://www.webmd.com/skin-problems-and-treatments/guide/understanding-hair-loss-basics" target="_blank">called alopecia areata is common in children and young adults and could result in complete baldness.</a>

  • There's No Cure For Baldness

    <strong>FALSE</strong> While there is no "miracle cure" there are certainly many treatments like government-approved drugs, laser therapy procedures or hair transplants.

  • Higher Testosterone Linked To Hair Loss

    <strong>FALSE</strong> "What you inherit is the sensitivity to dihydrotestosterone or DHT (a hormone and natural compound of testosterone) that can cause hair loss in men and some women," Bauman says. If you're male and you take testosterone, it could accelerate the hair loss process.

  • Hair Loss Comes From The Mother's Side

    <strong>FALSE</strong> There are approximately 200 genes that regulate hair and hair growth, Bauman says. "We know today that there are generally some genes from both sides of the family that play a role. Your mother’s father deserves some of the 'blame’ but perhaps not all of it."

  • Hats Can Cause Baldness

    <strong>FALSE</strong> Hats do not cause hair loss in any way or form. Period.

  • You Can Grow Back Dead Follicles

    <strong>FALSE</strong> Medications or laser therapy, for example, can help hair follicles grow thicker and healthier, but once the follicle is dead and gone, the only option for regrowth is a hair transplant.

  • Salmon

    When it comes to foods that have a beauty punch, it's hard to beat salmon. Loaded with omega-3 fatty acids, this high-quality protein source is also filled with vitamin B-12 and iron.

  • Dark Green Vegetables

    Spinach, like broccoli and Swiss chard, is an excellent source of vitamins A and C, which your body needs to produce sebum. This oily substance, secreted by your hair follicles, is the body's natural hair conditioner.

  • Beans

    Legumes like kidney beans and lentils should be an important part of your hair-care diet. Not only do beans provide protein for hair growth, but they also inject ample iron, zinc, and biotin into your locks.

  • Nuts

    Do you go nuts for thick, shiny hair? You should. Brazil nuts are one of nature's best sources of selenium, an important mineral for the health of your scalp. Walnuts contain alpha-linolenic acid, an omega-3 fatty acid that may help condition your hair. They are also a terrific source of zinc, as are cashews, pecans, and almonds. A zinc deficiency can lead to hair shedding, so make sure you eat nuts on the regular.

  • Poultry

    Chickens and turkeys may have feathers, but the high-quality protein they provide will help give you the healthy hair you crave. Low quality protein deficiences can cause weak brittle hair, while extreme deficiencies can cause a loss of hair colour. Poultry also provides iron with a high degree of bioavailability, meaning your body can easily reap its benefits.

  • Eggs

    When it comes to healthy hair, it doesn't matter whether you like your eggs scrambled, fried, or over easy. However they're served up, eggs are one of the best protein sources you can find. They contain biotin and vitamin B-12, which are important beauty nutrients.

  • Whole Grains

    Sink your teeth into hearty whole grains, including whole-wheat bread and fortified whole-grain breakfast cereals, for a hair-healthy dose of zinc, iron, and B vitamins.

  • Oysters

    While they are perhaps best known for their reputation as an aphrodisiac, oysters can also lead to healthy hair. The key to their love and hair-boosting abilities is zinc -- a powerful antioxidant. If oysters don't make a regular appearance on your dinner plate, don't despair. In addition to getting it from whole grains and nuts, you can also get zinc from beef and lamb.

  • Low-Fat Dairy Products

    Skim milk and yogurt are great sources of calcium, an important mineral for hair growth. They also contain whey and casein, two high-quality protein sources.

  • Carrots

    Carrots are an excellent source of vitamin A, which promotes a healthy scalp along with good vision.Since a healthy scalp is essential for a shiny, well-conditioned head of hair, you'd be wise to include carrots in your diet as snacks or toppings on your salad.

Overexposure To The Sun Causes Hair Loss
FALSE BUT SOMEWHAT TRUE
Ultraviolet (UV) radiation can cause skin problems like accelerated aging and cancer, but it will not interrupt hair follicle function, says hair expert Dr. Alan Bauman of Bauman Medical Group in Florida. However, overexposure of hair fibres to UV radiation can in fact weaken the fibres, disrupt the cuticle and make them more prone to dullness, frizz and breakage.

Pluck One Grey Hair And Two Grow Back
FALSE
The good news is pulling out grey hairs won't make more grow back. The bad news is most people get grey hair as they age anyway.

Over-Shampooing Can Make You Lose Hair
FALSE
Many people may notice they shed daily after they shampoo or brush their hair. "Hair follicles cycle on and cycle off and repeat that process over the course of their life span," says Bauman. Each day 100 to 200 hairs shed and these hair follicles are replaced by other hair follicles entering the growth phase.

Standing On Your Head Makes Your Hair Grow
FALSE
It may sound funny, but this is a commonly heard myth. Bauman says hair loss is not a blood flow problem, but instead can be caused by other factors like age and genetics. "Even if increased blood flow helped hair growth, you could not stay in that position long enough to have an effect on the hair follicles," Bauman says.

Balding Is Linked To Old Age
TRUE
Genetic male and female hair loss gets more common as we age. However, another type of hair loss called alopecia areata is common in children and young adults and could result in complete baldness.

There's No Cure For Baldness
FALSE
While there is no "miracle cure" there are certainly many treatments like government-approved drugs, laser therapy procedures or hair transplants.

Higher Testosterone Linked To Hair Loss
FALSE
"What you inherit is the sensitivity to dihydrotestosterone or DHT (a hormone and natural compound of testosterone) that can cause hair loss in men and some women," Bauman says. If you're male and you take testosterone, it could accelerate the hair loss process.

Hair Loss Comes From The Mother's Side
FALSE
There are approximately 200 genes that regulate hair and hair growth, Bauman says. "We know today that there are generally some genes from both sides of the family that play a role. Your mother’s father deserves some of the 'blame’ but perhaps not all of it."

Hats Can Cause Baldness
FALSE
Hats do not cause hair loss in any way or form. Period.

You Can Grow Back Dead Follicles
FALSE
Medications or laser therapy, for example, can help hair follicles grow thicker and healthier, but once the follicle is dead and gone, the only option for regrowth is a hair transplant.

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