Why are tall people more likely to get cancer? What we know, don’t know and suspect

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People who are taller are at greater risk of developing cancer. The World Cancer Research Fund reports there is strong evidence taller people have a higher chance of of developing cancer of the:

  • pancreas
  • large bowel
  • uterus (endometrium)
  • ovary
  • prostate
  • kidney
  • skin (melanoma) and
  • breast (pre- and post-menopausal).

But why? Here’s what we know, don’t know and suspect.

Pexels/Andrea Piacquadio
A tall woman and her partner are silhoutted against the sunset.
Height does increase your cancer risk – but only by a very small amount. Christian Vinces/Shutterstock

A well established pattern

The UK Million Women Study found that for 15 of the 17 cancers they investigated, the taller you are the more likely you are to have them.

It found that overall, each ten-centimetre increase in height increased the risk of developing a cancer by about 16%. A similar increase has been found in men.

Let’s put that in perspective. If about 45 in every 10,000 women of average height (about 165 centimetres) develop cancer each year, then about 52 in each 10,000 women who are 175 centimetres tall would get cancer. That’s only an extra seven cancers.

So, it’s actually a pretty small increase in risk.

Another study found 22 of 23 cancers occurred more commonly in taller than in shorter people.

Why?

The relationship between height and cancer risk occurs across ethnicities and income levels, as well as in studies that have looked at genes that predict height.

These results suggest there is a biological reason for the link between cancer and height.

While it is not completely clear why, there are a couple of strong theories.

The first is linked to the fact a taller person will have more cells. For example, a tall person probably has a longer large bowel with more cells and thus more entries in the large bowel cancer lottery than a shorter person.

Scientists think cancer develops through an accumulation of damage to genes that can occur in a cell when it divides to create new cells.

The more times a cell divides, the more likely it is that genetic damage will occur and be passed onto the new cells.

The more damage that accumulates, the more likely it is that a cancer will develop.

A person with more cells in their body will have more cell divisions and thus potentially more chance that a cancer will develop in one of them.

Some research supports the idea having more cells is the reason tall people develop cancer more and may explain to some extent why men are more likely to get cancer than women (because they are, on average, taller than women).

However, it’s not clear height is related to the size of all organs (for example, do taller women have bigger breasts or bigger ovaries?).

One study tried to assess this. It found that while organ mass explained the height-cancer relationship in eight of 15 cancers assessed, there were seven others where organ mass did not explain the relationship with height.

It is worth noting this study was quite limited by the amount of data they had on organ mass.

A tall older man leans against a wall while his bicycle is parked nearby.
Is it because tall people have more cells? Halfpoint/Shutterstock

Another theory is that there is a common factor that makes people taller as well as increasing their cancer risk.

One possibility is a hormone called insulin-like growth factor 1 (IGF-1). This hormone helps children grow and then continues to have an important role in driving cell growth and cell division in adults.

This is an important function. Our bodies need to produce new cells when old ones are damaged or get old. Think of all the skin cells that come off when you use a good body scrub. Those cells need to be replaced so our skin doesn’t wear out.

However, we can get too much of a good thing. Some studies have found people who have higher IGF-1 levels than average have a higher risk of developing breast or prostate cancer.

But again, this has not been a consistent finding for all cancer types.

It is likely that both explanations (more cells and more IGF-1) play a role.

But more research is needed to really understand why taller people get cancer and whether this information could be used to prevent or even treat cancers.

I’m tall. What should I do?

If you are more LeBron James than Lionel Messi when it comes to height, what can you do?

Firstly, remember height only increases cancer risk by a very small amount.

Secondly, there are many things all of us can do to reduce our cancer risk, and those things have a much, much greater effect on cancer risk than height.

We can take a look at our lifestyle. Try to:

  • eat a healthy diet
  • exercise regularly
  • maintain a healthy weight
  • be careful in the sun
  • limit alcohol consumption.

And, most importantly, don’t smoke!

If we all did these things we could vastly reduce the amount of cancer.

You can also take part in cancer screening programs that help pick up cancers of the breast, cervix and bowel early so they can be treated successfully.

Finally, take heart! Research also tells us that being taller might just reduce your chance of having a heart attack or stroke.

Susan Jordan, Associate Professor of Epidemiology, The University of Queensland and Karen Tuesley, Postdoctoral Research Fellow, School of Public Health, The University of Queensland

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Dates vs Figs – Which is Healthier?

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    Our Verdict

    When comparing dates to figs, we picked the dates.

    Why?

    Dates are higher in sugar, but also have a lower glycemic index than figs, which makes the sugar content much healthier. On the flipside, figs do have around 3x more fiber.

    So far, so balanced.

    When it comes to micronutrients though, dates take the prize much more clearly.

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  • Scheduling Tips for Overrunning Tasks

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Your Questions, Our Answers!

    Q: Often I schedule time for things, but the task takes longer than I think, or multiplies while I’m doing it, and then my schedule gets thrown out. Any ideas?

    A: A relatable struggle! Happily, there are remedies:

    • Does the task really absolutely need to be finished today? If not, just continue it in scheduled timeslots until it’s completed.
    • Some tasks do indeed need to be finished today (hi, writer of a daily newsletter here!), so it can be useful to have an idea of how long things really take, in advance. While new tasks can catch us unawares, recurring or similar-to-previous tasks can be estimated based on how long they took previously. For this reason, we recommend doing a time audit every now and again, to see how you really use your time.
    • A great resource that you should include in your schedule is a “spare” timeslot, ideally at least one per day. Call it a “buffer” or a “backup” or whatever (in my schedule it’s labelled “discretionary”), but the basic idea is that it’s a scheduled timeslot with nothing scheduled in it, and it works as an “overflow” catch-all.

    Additionally:

    • You can usually cut down the time it takes you to do tasks by setting “Deep Work” rules for yourself. For example: cut out distractions, single-task, work in for example 25-minute bursts with 5-minute breaks, etc
    • You can also usually cut down the time it takes you to do tasks by making sure you’re prepared for them. Not just task-specific preparation, either! A clear head on, plenty of energy, the resources you’ll need (including refreshments!) to hand, etc can make a huge difference to efficiency.

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  • ‘I can’t quite shut it off’: Prevalence of insomnia a growing concern for women

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Tasha Werner, 43, gets up at 3:30 a.m. twice a week for her part-time job at a fitness centre in Calgary. After a five-hour shift, she is back home by 9 a.m. to homeschool her two children, aged 9 and 12. The hardest part of her position – stay-at-home mom, homeschool teacher and part-time worker – is the downtime “lost from my life,” says Werner.

    A study by Howard M. Kravitz, a psychiatrist in Chicago, showed that up to 60 per cent of women experience sleep disorders due to hormonal changes linked to menopause. But there is an increasing prevalence of insomnia symptoms in women that may be attributed, in part, to societal changes.

    “We live in a world that didn’t exist a generation ago. Now everyone is trying to figure it out,” says Michael Grandner, director of the Sleep and Health Research Program at the University of Arizona.

    While women are no longer expected to stay at home, many who are employed outside the home also have the primary responsibility for family matters. And women aged 40 to 60 commonly fall within the “sandwich generation,” caring for both children and parents.

    As women juggle their responsibilities, these duties can take a toll, both emotionally and practically.

    Both Werner and her husband were raised in traditional homes; their mothers stayed at home to oversee childcare, cooking, grocery shopping and household duties. Initially, Werner and her husband followed a similar path, mirroring their parents’ lives as homemakers. “I think we just fell into what we were used to,” says Werner.

    However, a notable shift in their family dynamics occurred once she started working outside the home.

    Her children’s physical needs and illnesses have had major consequences on her sleep. If one of the children is sick with the flu, that’s “a week of not a lot of sleep during the night,” she says, “because that’s my job.” Many nights, she finds herself waking up between 1 a.m. and 3 a.m., worrying about how the kids are doing academically or behaviourally.

    “We face a specific set of anxieties and a different set of pressures than men,” says Emma Kobil, who has been a therapist in Denver, Colo., for 15 years and is now an insomnia coach. There is so much pressure to be everything as a woman – to be an amazing homemaker and worker while maintaining a hot-rocking body and having a cool personality, to “be the cool mom but also the CEO, to follow your dreams and be the boss b****,” says Kobil.

    And there’s an appeal to that concept. Daughters grow up viewing their moms as superwomen juggling responsibilities. But what isn’t always obvious are the challenges women face while managing their lives and the health issues they may encounter.

    A study revealed that women are 41 per cent more at risk of insomnia than men.

    A thorough study revealed that women are 41 per cent more at risk of insomnia than men. Beyond menopausal hormonal shifts, societal pressures, maternal concerns and the challenge of balancing multiple roles contribute to women’s increased susceptibility to insomnia.

    Cyndi Aarrestad, 57, lives on a farm in Saskatchewan with her husband, Denis. Now an empty nester, Aarrestad fills her time working on the farm, keeping house, volunteering at her church and managing her small woodworking business. And she struggles with sleep.

    Despite implementing some remedies, including stretching, drinking calming teas and rubbing her feet before bed, Aarrestad says achieving restful sleep has remained elusive for the past decade.

    Two primary factors contribute to her sleep challenges — her inability to quiet her mind and hormonal hot flashes due to menopause. Faced with family and outside commitments, Aarrestad finds it challenging to escape night time’s mental chatter. “It’s a mom thing for me … I can’t quite shut it off.” Even as her children transitioned to young adulthood and moved out, the worries persisted, highlighting the lasting concerns moms have about their kids’ jobs, relationships and overall well-being.

    Therapist Kobil says that every woman she’s ever worked with experiences this pressure to do everything, to be perfect. These women feel like they’re not measuring up. They’re encouraged to take on other people’s burdens; to be the confidante and the saviour in many ways; to sacrifice themselves. Sleep disruptions simply reflect the consequences of this pressure.

    “They’re trying to fit 20 hours in a 24-hour day, and it doesn’t work,” says Grandner, the sleep specialist.

    Grandner says that consistently sleeping six hours or less as an adult makes one 55 per cent more likely to become obese, 20 per cent more likely to develop high blood pressure, and 30 per cent more likely to develop Type 2 diabetes if you didn’t have it already. This lack of sleep makes you more likely to catch the flu. It makes vaccines less effective, and it increases your likelihood of developing depression and anxiety.

    When is the time to change? Yesterday. Grandner warns that the sleep sacrifices made at a young age impact health later. But it’s never too late to make changes, he says, and “you do the best with what you’ve got.”

    Kobil suggests a practical approach for women struggling with sleep. She emphasizes understanding that sleeplessness isn’t a threat and encourages a shift in mindset about being awake. Instead of fighting sleeplessness, she advises treating oneself kindly, recognizing the difficulty.

    Kobil recommends creating a simple playbook with comforting activities for awake moments during the night. Just as you would comfort a child who’s afraid, she suggests being gentle with yourself, gradually changing the perception of wakefulness into a positive experience.

    This article is republished from HealthyDebate under a Creative Commons license. Read the original article.

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