Latest / Morning Medical with Dr. Chow / Meal Timing and Metabolism, Menopausal Therapy Risks, and Walking for Health Benefits

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Meal Timing and Metabolism, Menopausal Therapy Risks, and Walking for Health Benefits · Morning Medical with Dr. Chow

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  Welcome to Morning Medical with Dr.
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  Chow, where we delve into the latest in medical and health news from around the globe.
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  I'm your host, Dr.
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  Chi-Ming Chow, a cardiologist based in Toronto, Canada.
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  Today, we're diving into some fascinating research on the timing of our meals and how it
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  might impact our metabolic health.
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  A recent study published in The Journal of Nutrition explored the relationship between
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  when we eat and our metabolic health, particularly looking at metabolic syndrome and
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  obesity among Korean adults.
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  Metabolic syndrome is a cluster of conditions including high blood pressure, high blood
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  sugar, excess body fat around the waist, and abnormal cholesterol levels, all of which
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  increase the risk of heart disease, stroke, and diabetes.
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  The study involved nearly 17,000 participants from the Korean National Health and Nutrition
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  Examination Survey, and it aimed to uncover how different eating patterns might be linked to
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  metabolic health.
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  Researchers looked at three main eating patterns: early, late-short, and grazing.
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  Each pattern was defined by the timing and frequency of eating throughout the day.
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  The 'early' pattern involved having the largest share of daily energy intake before 11 AM, with
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  a more balanced distribution throughout the day.
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  The 'late-short' pattern, on the other hand, involved consuming the least amount of energy
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  before 11 AM and the most after 5 PM, within a shorter eating window.
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  The 'grazing' pattern was characterized by a longer eating window and more frequent eating
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  occasions.
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  Interestingly, the late-short eating pattern was associated with a higher likelihood of
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  metabolic syndrome and related risk factors, such as high blood pressure and elevated blood
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  sugar levels.
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  Meanwhile, the grazing pattern, although linked to higher blood sugar, was associated with
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  lower odds of obesity and abdominal obesity compared to the early pattern.
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  These findings suggest that the timing of our meals could be just as important as what we're
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  eating when it comes to metabolic health.
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  However, it's important to note that the study was cross-sectional, meaning it can't establish
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  a cause-and-effect relationship.
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  More research is needed to fully understand the implications of meal timing on metabolic
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  health.
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  Let's move on to a fascinating study that explores the potential heart health benefits of
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  menopausal hormone therapy, or MHT, for women experiencing vasomotor symptoms, which include
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  hot flashes and night sweats.
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  This new research, published in JAMA Internal Medicine, suggests that the timing of hormone
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  therapy initiation and the race of the individuals may play significant roles in
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  determining who might benefit from these treatments.
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  The study focused on perimenopausal and recently postmenopausal women who did not have
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  a history of cardiovascular disease.
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  It found that initiating MHT was linked to a 22 percent reduction in cardiovascular disease
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  events.
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  This benefit was particularly notable for women who started hormone therapy within ten years of
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  the onset of menopause.
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  These women saw an estimated 27 percent reduction in cardiovascular disease risk.
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  However, the benefits were not observed in those who began therapy more than ten years
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  after menopause onset.
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  Interestingly, the study also highlighted racial differences.
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  Black women who initiated MHT showed a significant protective effect against
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  cardiovascular disease, while no clear benefit was observed for women of other races.
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  This finding underscores the importance of personalized medical approaches, taking into
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  account individual patient characteristics such as race and timing of therapy initiation.
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  Despite these promising findings, the authors caution against using MHT solely for
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  cardiovascular disease prevention due to the lack of consistent benefits across all
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  populations and the overall risk-benefit balance.
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  It's crucial for women to have informed discussions with their healthcare providers
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  about the potential advantages and risks of hormone therapy, especially for managing
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  vasomotor symptoms.
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  The study also noted an increased risk of breast cancer among those who initiated MHT
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  compared to non-initiators, although there was no significant difference in the occurrence of
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  venous thromboembolism events between the two groups.
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  This aspect of the study highlights the complexity of MHT and the need for careful
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  consideration of all potential risks and benefits.
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  It's important to note that this study differs from the well-known Women's Health Initiative
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  study, as it included younger women and focused on those who began MHT during perimenopause or
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  early postmenopause.
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  The study's authors used data from the Study of Women's Health Across the Nation, which
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  followed over 3,000 women for more than two decades, to emulate a sequence of target
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  trials.
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  This robust dataset provides a strong observational foundation, although randomized
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  controlled trials are still needed to further validate these findings.
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  Today, we turn our attention to a recent health update from former President Joe Biden, who has
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  been open about his journey with prostate cancer.
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  Biden, now 83, shared in a social media post during Prostate Cancer Awareness Month that his
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  radiation treatment from last fall "worked as intended." This update brings a sense of relief
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  and underscores the importance of early detection and treatment.
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  Biden's message emphasized the significance of not delaying conversations with healthcare
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  providers about cancer screening.
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  He urged American men to take proactive steps in discussing prostate cancer with their
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  doctors, highlighting that early detection dramatically increases survival rates.
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  "Talk to your doctors.
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  Ask the hard questions.
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  Do it for yourself, and do it for the people who love you," Biden wrote, stressing the
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  importance of these conversations.
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  The American Cancer Society recommends that men at average risk start discussing prostate
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  cancer screening with their doctors at age 50.
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  However, for Black men and those with a family history of prostate cancer, these discussions
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  should begin earlier, around age 45.
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  For those at even higher risk, it's advised to start as early as age 40.
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  These guidelines aim to catch the disease early when treatment is often more successful.
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  Biden's diagnosis, which was announced in May 2025, revealed an aggressive form of prostate
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  cancer that had metastasized to his bones.
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  Despite the severity, the cancer was hormone-sensitive, allowing for effective
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  management through radiation therapy.
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  Biden completed his course of treatment last fall, and his recent update suggests a positive
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  response to the therapy.
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  In his message, Biden expressed gratitude towards the medical professionals who have been
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  part of his care.
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  He also thanked those who have continued to pray for him and his family, highlighting the
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  emotional support he has received.
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  "It’s my hope and prayer that by sharing our experience and being part of this important
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  conversation, we can help save lives," he wrote, encouraging others to maintain hope and
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  faith.
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  Let's talk about a fascinating new study that offers a fresh perspective on our daily step
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  goals.
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  If you've been diligently tracking your steps each day, you might be missing another key
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  component: the pace at which you're walking.
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  According to a study published in the British Journal of Sports Medicine, taking fewer steps
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  at a brisker pace could potentially offer similar health benefits to taking more steps at
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  a slower pace.
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  This challenges the conventional wisdom that you need to hit the often-cited target of ten
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  thousand steps a day to reap health benefits.
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  Interestingly, the ten thousand steps goal didn't originate from a scientific study.
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  Instead, it dates back to a 1960s marketing campaign for a Japanese pedometer.
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  Emmanuel Stamatakis, a professor of physical activity, lifestyle, and population health at
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  Monash University in Melbourne, explains that for many, especially older adults or those with
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  limited time, ten thousand steps can feel overwhelming.
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  This might discourage people from even attempting to start a walking routine.
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  The study utilized data from over one hundred thousand middle-aged adults who were part of
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  the UK Biobank study.
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  These participants wore activity trackers for a week, allowing researchers to measure both
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  their daily step counts and their walking pace.
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  The findings suggest that both walking more steps and walking at a faster pace are linked
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  to a lower risk of early death, indicating that there's more flexibility in how we achieve our
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  health goals through walking.
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  In particular, the study found that among individuals walking fewer than five thousand
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  steps a day, those who maintained a peak cadence of at least eighty steps per minute had
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  a significantly lower risk of death, comparable to those taking five to seven thousand five
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  hundred steps at a slower pace.
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  This highlights the potential benefits of walking briskly, even if you don't reach the
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  ten thousand step mark.
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  For those who might find it difficult to increase their daily step count, incorporating
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  a brisk thirty-minute walk could be a practical alternative.
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  Stamatakis points out that there's no one-size-fits-all pace, as it varies based on
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  individual fitness levels, age, and body weight.
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  The key is to find a pace that feels challenging yet manageable, where your
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  breathing becomes heavier, but you can still speak in short sentences.
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  The study's findings underscore that consistency is crucial.
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  What matters is what you do on most days over time, not just a short burst of activity.
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  For individuals with cardiovascular risk factors or who have been inactive for years,
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  it's important to gradually build up pace and check with a healthcare provider before
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  increasing intensity.
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  While the study is observational and cannot definitively say that walking faster reduces
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  mortality risk, it aligns with existing knowledge that a combination of exercise
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  magnitude, intensity, and frequency is beneficial.
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  Experts like Daniel Lieberman from Harvard University, who wasn't involved in the study,
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  emphasize the importance of regular physical activity, suggesting that any movement is
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  better than none, and incorporating a mix of activities can be particularly beneficial.
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  For those looking to enhance their walking routine, starting slowly and making gradual
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  changes can make it more sustainable.
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  Enjoyable activities, like walking with a friend or incorporating walking into daily
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  tasks, can help keep you motivated.
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  As Phil Chilibeck from the University of Saskatchewan suggests, increasing your walking
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  pace for shorter distances can provide similar benefits to longer, slower walks.
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  Ultimately, any increase in physical activity is a step in the right direction towards better
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  health.
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  Now, let's discuss a topic that might make you reconsider your morning routine.
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  A large-scale study from Oxford University, published in the International Journal of
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  Cancer, has found that regularly consuming very hot beverages, such as tea or coffee, could
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  significantly increase the risk of developing cancer of the food pipe, also known as
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  esophageal cancer.
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  The research involved nearly one million individuals and is considered the largest study
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  to date examining this link.
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  According to the findings, people who drank their beverages "very hot" had about a
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  threefold higher risk of esophageal cancer compared to those who drank their tea or coffee
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  at "warm" temperatures.
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  While this may sound alarming, it's important to remember that the overall risk of developing
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  esophageal cancer remains relatively low.
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  The study defines "very hot" drinks as those at 65 degrees Celsius or higher.
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  This temperature can damage the lining of the esophagus as the hot liquid makes its way down
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  to the stomach.
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  To give you some context, tea made immediately after boiling water is poured can be as hot as
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  90 to 95 degrees Celsius.
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  The advice here is simple: let your drink cool down a bit before you take that first sip.
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  Experts suggest waiting until your drink is comfortable to sip rather than scalding hot.
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  Although adding milk might lower the temperature slightly, it might not cool it down
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  enough to avoid potential harm.
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  For those curious, the ideal temperature for a takeaway coffee is around 49 to 60 degrees
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  Celsius, according to some manufacturers.
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  Interestingly, this study adds to previous research from South America, where a hot herbal
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  drink called mate has been linked to similar cancer risks.
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  However, more research is needed to pinpoint the exact temperatures that pose the highest
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  risk.
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  While the study suggests that avoiding very hot drinks could prevent one or two out of every
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  ten cases of squamous cell esophageal cancer, it's crucial to keep in mind that other
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  factors, such as smoking and alcohol consumption, have a more significant impact on
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  cancer risk.
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  Fiona Osgun from Cancer Research UK emphasizes that the most effective ways to reduce your
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  risk are to avoid smoking and to limit alcohol intake.
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  Symptoms of esophageal cancer can include persistent heartburn, indigestion, or pain in
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  the throat or chest, along with unexplained weight loss.
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  If you experience any of these symptoms, it is advisable to consult with a healthcare
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  professional.
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  As we wrap up today's episode, I hope this information has given you food for thought, or
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  perhaps, drink for thought.
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  Whether it's adjusting the temperature of your favorite hot beverage or taking a brisk walk,
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  these small changes can contribute to your overall health.
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  Thank you for tuning in to Morning Medical with Dr.
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  Chow.
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  Stay informed, stay healthy, and I'll see you next time.