Category Archives: Biological Sciences

Rhinitis-small problem, big risk!

Have you ever been disturbed by a runny nose, endless sneezing, or nasal congestion? If you have these symptoms more than one week, be careful you may have rhinitis! Rhinitis is a nasal disease that inside nose gets inflammation after irritated by environmental conditions.  Not only outside conditions, such as pollen, smoke or chemicals, but also inside conditions, like hormonal changes, may provoke the disease. There are three kinds of rhinitis: allergic, nonallergic, and mixed.  Generally, rhinitis just lasts a few days but allergic rhinitis can reoccur frequently.

A short animation of allergic rhinitis.

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Rhinitis is not new to us. World Health Organization declared that between 10% and 30% population have allergic rhinitis in the worldwide. According to Summary Health Statistics for U.S. Adults: National Health Interview Survey, approximately 7.8% teenagers in U.S. have hay fever – allergic rhinitis. It seems that rhinitis has similar symptoms as cold; people dislike it, but also ignore it. However, untreated rhinitis can cause many serious consequences!

          

 

Being careless to rhinitis may lead to poor quality of life. Uncontrolled rhinitis may contribute to sleep loss, learning impairment, and decreased long-term productivity. Additionally, poorly controlled allergic rhinitis may also contribute to the development of other related diseases including acute and chronic sinusitis, recurrence of nasal polyps, hearing impairment, abnormal craniofacial development, sleep disorder and asthma.

Apart from above consequent diseases, what’s worse is that chronic rhinitis is discovered to be associated with atrophic rhinitis! Atrophic rhinitis is a disease where the nose tissues, especially nasal mucosa, permanently atrophy. Nasal mucosa, also called mucous membrane, lines over the nasal cavity. Mucosa consists of tiny blood veins, glands, and nerves. The major functionality of mucosa includes secreting mucus to trap external particles, humidifying the entire cavity, and warming air entering the respiratory passage.

Here is a video explaining the functionality of nasal mucosa.

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Because of the loss of mucosa, patients lose the primary barrier between the external world and the interior of the body. Atrophic rhinitis can be a crippling disease. Without the protection, patients will suffer unrelenting dryness, loss of sense of airflow, and even pain breathiness. Furthermore, the disease is irreversible; patients have to suffer the pain throughout their lives.

Fortunately, there are some measurements that people can take to prevent atrophic rhinitis.

  • Nasal irrigation with saline solution – recurrent inflammation is one of the most triggers. Rinsing nose daily with salt water can kill bacteria and avoid infection.
  • Ingesting food that riches in iron and vitamin A/D – Bernat I. stated in “Ozaena and iron deficiency” that many patients showed a nutritional deficiency, especially of iron, fat-soluble vitamins and proteins.
  • Exercise! – cliché, but always the most effective. For many people who have allergic rhinitis, it is impossible to eliminate the problem. However, doing exercise can improve the immune system and reduce the frequency of rhinitis.
  • See a doctor when the disease is at the early stage!

Overall, even though rhinitis is not life-threatening at the early stage, we need to be aware of its risk and take it carefully. Don’t risk our health!

By Xinyue Tang

 

A Glass a Day Keeps the Doctor Away!

At the end of a draining week, there is nothing more satisfying than having that long awaited glass of red wine. This may seem like a guilty pleasure, but what if your favourite weekend beverage actually has proven health benefits?

Source: Flickr

History has shown that red wine has been in production for over 6000 years, and has been used primarily for religious purposes since its origin. However, red wine has been proven to have significant health benefits.

The term wine describes an extensive class of alcoholic beverages, which are the result of grape fermentation. Wine is a fruit product produced from grapes, however the process of fermentation allows it to transform from regular grape juice into the beverage that we all know know as wine!

Ethanol is the alcoholic component in wine, and it has been proven that moderate ethanol consumption can lead to a longer lifespan. A study in eastern France was conducted, and moderate red wine consumption, which was defined as 2-5 glasses per day, was shown to have a 24%-31% reduction in mortality. Now, how exactly does red wine make you live longer?

What makes red wine so special is the content of secondary metabolites in grapes, which are called polyphenols. Secondary metabolites are organic molecules that are not directly involved in plant development. Rather, they indirectly aid in defense mechanisms, and keep plants safe. The skin and stems of grapes (the source of polyphenols) are essential components in the red wine making process. This also explains why red wine has greater benefits when compared to white wine.

These polyphenols have very prominent antioxidant properties, which help to lower the overall risk of chronic diseases. They protect our body’s cells from damage, thus helping to lower the possibility of heart conditions, diabetes, and even cancer. Specifically, there is strong evidence that atherosclerotic cardiovascular disease mortality is decreased through consumption of red wine. This means that red wine prevents build-up of fats and other substances in the arteries, ultimately reducing the risk of heart disease.

Source: Flickr

Now it is important to remember that this is all in moderation, and doctors recommend 5 ounces, or 1-2 glasses of red wine a day. Consequently, excess consumption of red wine, and similarly other alcoholic beverages, will not have the same effects, and can even lead to higher mortality. So remember, red wine may in fact have health benefits, but it is only a glass a day that will ultimately keep the doctor away.

Bottoms up!

By Alexis Llewellyn

 

 

 

4 Health-Boosting Hobbies

In an age of pills, prescriptions, and fad diets, it’s good to know that there are more natural ways to maintain our health. These are four great hobbies for boosting your personal wellbeing:

  1. Dancing 

    source: flickr

    While dancing may not be everyone’s strong suit (me and my ‘dad-like’ dancing included), it’s hard to deny that nearly everyone enjoys busting loose to some funky tunes. Besides dancing’s ability to improve cardio and strengthen bones and muscle, one of dancing’s most noteworthy benefits is its capacity to considerably improve balance in the elderly. A 2011 Cochrane Review demonstrated that elderly subjects who danced at least three times a week significantly enhanced their balance. This is valuable research because, according to the Center for Disease Control and Prevention (CDC), 2.8 million elderly people are hospitalized due to unintentional falls each year, and this number is steadily growing. Maybe getting old folks to implement some jive into their daily routine will help reduce this statistic (assuming no one breaks a hip).

  2. Writing about Traumas/Difficulties

    source: flickr

    Researchers are now telling us that sitting at a desk all day with a pen and paper can actually enrich our personal health. Writing about personal experiences/difficulties has been shown to improve the mental health of cancer patients by encouraging them to view their situation in a more positive light. In addition to boosting mental health, the act of writing has also been linked with improvements in physical health. An Australian study demonstrated that patients who wrote about distressing life events (Expressive Writing group) had a significantly faster wound-healing rate than patients who wrote about simple daily tasks (Time Management group); by day 11 post-injury, 76% of the Expressive Writing patients were fully healed, while only 42% of the Time Management patients were fully healed.


  3. Listening to Music

    source: flickr

    In case dancing just really isn’t your forte, it’s good to know that the simple act of listening to some tunes benefits your health as well. A meta-analysis conducted by Medical News Today investigated how listening to music influences our neurochemistry. The main conclusion stated that music boosts the immune system, lowers stress and anxiety, and dampens symptoms of depression. In some cases, music was even found to be more effective at reducing anxiety than certain prescription drugs!

  4. Owning a Pet

    source: flickr

    Apparently, the relationship between you and your pet is a little more ‘give’ than ‘take’ from your pet’s perspective. According to the CDC, owning a pet not only improves your lifestyle by creating more opportunities for outdoor activities, exercise, and socialization, but it can also improve your physical health by decreasing blood pressure, cholesterol levels, and fat levels in your blood (all of which are risk factors for heart disease). Cleaning out litter boxes and filling up water bowls seems like a small price to pay for the health benefits that accompany living with pets.

 

 

How much can babies really understand?

Whether you love them or hate them, at some point in your life you have likely talked to a baby. Often, we don’t associate them to have a vocabulary that goes anything beyond “goo goo gaga” so we don’t expect them to understand the slightest of what we are saying. It isn’t until they’re nearly two years old that we expect them to start speaking and communicating in comprehensible language. However, studies have shown that infants at 6 months of age may be able to comprehend the meanings of common nouns.

Source: Flickr

In Bergelson & Swingley’s study, they presented images to infants between the ages of 6 and 9 months while parents named the objects in the pictures. When named, the researchers found that the infants would gaze towards the associated image. This study suggested that infants were able to understand their parents before 15 months of age, which was previously thought to be the age where understanding began.

Setup for Bergelson & Swingley’s study on infant understanding. Sourced from their published study,

Now this work inspired further investigation. How much do these infants really understand? Do all infants equally develop understanding of common nouns at the same points in life? Bergelson performed a more recent study that suggested infants are more easily able to tell the difference between words that are semantically unrelated, such as milk and foot, than when they are related (milk and juice). This was the first time infants of this age were observed utilizing their understanding of phonemes to comprehend human language.

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It seems obvious that an infant would not be able to make that distinction as easily; however, this lack of distinction is also observed in adult understanding of languagePrevious studies have been conducted like the Bergelson & Swingley study, in which images were placed before adult participants and their eye movements were tracked when words were spoken to them. A delay in eye fixation was observed when related images were shown to the adult participant versus images that were completely unrelated. As it turns out, our understanding of common nouns is not far from that of a 6-month old infant. This is the first time a similarity in language comprehension of this scale has been observed between adults and infants at the age of 6 months.

Source: Flickr

New developments such as this suggest that infants are learning and developing understanding on a much faster rate than previously thought. It’s worth noting that there are short-comings to this research. For one, there were only 51 children studied and most of the infants were from white, middle-class families. However, this opens the door to further studies on infant cognition. Perhaps next time we talk to a baby, we might be more careful with the words we choose, because it seems that they understand more than what we once thought.

By Faraz Kazi

A cool and refreshing way to lose weigh

Many have been struggling with losing weight. Some people choose to control their diet very strictly. Others try to lose weight by going to the gym very frequently. These ways can definitely help people to reach their goals. However, it is painful for some people to only eat healthy food. And going to the gym takes a lot of time and energy. Here comes a simple and cool solution — drinking water. Most people know that water is very essential to our lives. But can you imagine that you can easily lose weight simply by drinking more water? 

[source: https://pixabay.com/en/lose-weight-fat-slim-diet-loss-1911605/]

Surprisingly that is true. Scientists have found that drinking water can increase the resting metabolic rate(RMR) of adults. RMR is the measurement of the rate of body’s metabolism. Higher RMR means human body can consume more calories by spending the same amount of energy. One experiment is conducted on overweighted women who normally drink less than 0.5 L water every day. The result of it shows that the increased intake of water to over 1 L per day can make a significant difference in body weight. After over a  12-month period, most overweight women who participated in the experiment lost more than 2 kg. Because all the participants were required not to change their lifestyle except to drink more water, this study shows the direct relationship between the intaking amount of water and the weight loss. 

 

[source: https://pixabay.com/en/tape-tomato-glas-diet-water-403592/]

Given the fact that drinking more water does help us reduce the body fat, what is the proper way to drink water based on this theory?

First, don’t forget to drink water before the meal. This can help to reduce your appetite. According to a research based on adults subjects, pre-meal water consumption has an effect on the reduction of meal energy intake, especially for older adults. This is due to the sense of fullness provided by water. Because the hunger ratings were lower and fullness ratings were higher after drinking water, people tend to eat less after drinking the required amount of water.  However, for those of you who are not older adults, it is still a good advice. Although this may not have that impressive effect on you at the same level as the middle-aged people, it still helps you to avoid overeating.

Second, try to drink one more cup of water every day and replace other sweetened beverage with water. Sugars in the sweetened beverage are the biggest enemy of losing weight. A study shows that drinking beverage can not only increase the energy intake and body weight but also increase the risk of several medical problems. It has been proved that the daily intake of water can have an influence on people’s behavior and emotions. In general, you should drink water as soon as you feel thirsty and drink enough to quench your thirst. However, it is not good to over drink the water. 1-2 liters of water per day is recommended to help stay healthy and lose weight. 

[source: https://pixabay.com/en/thirsty-man-drink-drinking-water-937395/]

Isn’t it cool to lose weight simply by drinking water? For those of you who are not interested in working out or being upset of controlling the diet, this refreshing way can be your lifesaver! If you still doubt it, just try to drink more water from now on! It does not take much effort but can give you a huge benefit.

By Qingyue Wang

“Gluten-Free” – Is it as Healthy as We Think?

I’m guessing that the majority of you have seen the increasingly popular “gluten-free” diet trend displayed in many health-related magazines, books or even talk shows. But why is everybody so obsessed with this new diet fad? Well, apparently, it’s supposed to be one of the healthiest changes that you can make to your lifestyle. One scientific study even suggests that a gluten-free diet can reduce the level of “bad” fats in your blood that lead to heart disease, but is gluten-free really as healthy as it’s claimed to be?

Gluten-Free Bread; photo courtesy of Pixabay user Aline Ponce

Being “gluten-free” first arose as a treatment for individuals with celiac disease, a disorder that causes damage to the small intestine from ingesting gluten. Celiacs experience many symptoms, ranging from severe gastrointestinal issues to even developing anemia and behavioural changes. Unfortunately, the only real way to combat this is through the complete elimination of gluten from one’s diet.

Gluten is a protein found in wheat, barley, and rye. As awareness of celiac disease has increased, so have gluten-free alternatives to popular foods. As a response, many non-celiacs have been transitioning to this diet as well, assuming that it is a healthier lifestyle. However, relatively new evidence suggests that being “gluten-free” isn’t as beneficial to your health as you may believe.

Dr. Travis speaks about the gluten-free diet industry.

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In Digestive Diseases and Sciences, a study observed the risk of metabolic and cardiovascular disease among non-celiac individuals following a gluten-free diet. The study concluded that there was an association between being gluten-free and weight management, but this is likely because gluten-free individuals do not consume refined wheat products, which are harmful to your health. Interestingly, there was no difference in the risk of metabolic disease or heart disease between gluten-free and non-gluten-free individuals.

Additionally, the Mayo Clinic suggests that those who are adopting a gluten-free diet should be wary of losing some essential vitamins and nutrients, like iron, calcium, and fiber. Whole grains are usually enriched in these, so you would have to be diligent in finding them in other sources.

Gluten-Free Mix; photo courtesy of Flickr user, ‘theimpulsivebuy’

Gluten-free individuals should also be mindful of the fact that many store-bought, gluten-free foods are no better for you than the versions made with gluten. This is because many of these foods actually contain more sugar, fat, and calories than the original versions, leading to weight-gain rather than weight-loss. It is a common misconception that just because something is “gluten-free,” it is also healthier.

Overall, the stance on whether or not a gluten-free diet is beneficial to non-celiacs is very controversial. As long as one is aware of what is actually inside the gluten-free foods that they are consuming, as well as of all the daily nutrients that they should be obtaining, then this diet is potentially beneficial. Although, it may not be worth it if whole grains, in moderation, have shown no detrimental effect on health. The most important thing for non-celiacs to remember is that a “gluten-free” label does not automatically equal “healthy.”

By Silvana Jakupovic

Olive Oil- a prevention to cardiovascular risk

Cardiovascular disease is thought to be solely a result of genetic and environmental factors; however individuals diet is the most significant role player in a healthy heart. Most health gurus and dieticians have raved about the benefits of olive oil. How exactly does this Mediterranean delight help our heart stay healthy?

Dr Bob explains the beneficial properties of olive oil.

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The First International Conference on the Healthy Effects of Virgin Olive Oil (VOO) presented a scientific summary of the health benefits of olive oil. Olive oil consists of bioactive components including the unsaponifiable and the soluble fraction, that contains phenolic compounds. According to the EUROLIVE study, the phenolic content in olive oil reduces serum triacylglycerols and increases high-density lipoprotein (HDL)-cholesterol and the reduced-to-oxidized glutathione ratio in a dose-dependent manner depending on the concentration of phenolic compound. This significantly reduced cardiovascular risk.

In addition, scientists from Hospital del Mar Medical Research Institute in Barcelona took measurements of how HDL is working. They found out that individuals that consumed a diet rich in olive oil had better functioning HDL. Hence, they were able to pluck LDL out effectively from the heart vessel walls and move them to the liver for removal. This made them more better able to work antioxidants, giving security against inflammatory related damages that can destroy blood vessels and make them more susceptible to heart attacks.

Dr Gundry conducts an experiment to show the benefits of olive oil to your heart

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The human heart is one of the most essential organ for successful living. The heart is accountable for many functions of your body including transportation of oxygen and a healthy immune system. Apart from your genetics and surrounding environment, your diet plays an significant role in the health of your heart. Olive oil is the miracle power food containing healthy fats that will keep your heart bright and glowing.

Save the plastic = Save the life


This video is from National Geographic “How the global ocean plastic pollution problem has become ubiquitous”.

Recently, a catastrophic news “Plastic Garbage Patch Bigger Than Mexico Found in Pacific” published last year has caught public attention. It reported a new finding of a huge region of plastic pollution in South Pacific (near the coastal region of Chile and Peru).

The plastic pollution in the ocean not only means floating bottles or buoys which can be easily discovered but also includes the small pieces of plastic debris which may be invisible. So the ocean cleanup is very difficult. Based on the historical data in 2012, the mean abundance of plastic pollution in South Pacific was roughly 71 kg/km2. What a shocking number it is! The extreme increase of the plastic pollution in South Pacific over the last six years has threatened many marine species and seabirds.

The plastic garbage “patch” includes both big piece (macro-plastics) and very small piece (micro-plastics). In a short-term effect, those seabirds and marine species who accidentally ingested or consumed plastics will stick in their tissues forever (just like the image below). The previous research has shown that mussels ingested micro-plastics through gills would transport to the stomach and digestive glands. In biology classes, we learned that toxins will be accumulated through the food chain and magnified in carnivorous species. As a result, more species will be harmed. Eventually, the whole ecosystem may be negatively impacted.

Plastic debris was found in seabird’s stomach; Photo courtesy by Chris Jordan

Right now, the first aid is to clean up the plastic waste in the ocean. This is because the residence time of plastics in the ocean is very long. Also, its degradation time under UV light and water is still uncertain. After breaking into small pieces, micro-plastics will further sink down to the ocean and release toxic chemicals. Although it is a difficult work to clean up all the plastics in the ocean, we still need to try our best to solve the existing garbage. Thus we can prevent further contamination of the marine environment.

Moreover, it is important to increase public awareness of the garbage dumping near coasts. Since most of the containments are anthropogenic, if the general public can get better understandings of the harmfulness of certain behavior, the marine ecosystem will be more sustainable.

In the future studies, scientists should focus more on the problem solving of the ocean plastic pollution, especially appropriate garbage disposal and recycling. Also, an alternative material to plastics that is nontoxic and easily degraded is encouraged to be investigated.

By Jenny Tang

Here’s Why Coffee Is Good for Your Health

We all love our morning coffee. Photo courtesy of blogTO

Coffee has existed since approximately the 15th century – and over these years it has amassed a lot of confusion about its effect on your health.  The media has played a role in pushing a negative view towards the effects of coffee. Us coffee lovers have always had a family member or friend comment with an expression of concern regarding our love for coffee.  It’s about time coffee drinkers put an end to this narrative!

Well, if you are a huge coffee lover, you will be happy to know that scientists have discovered that there is no connection between coffee and an increased risk of cancer or heart disease. In fact, the Universities of Southampton and Edinburgh published a meta-analysis investigating the effects of coffee on health. Amazingly enough, the paper used an extensive sample size analyzing over 200 papers! They found that drinking three to four cups of coffee a day may actually improve your health. Furthermore, they concluded that those who drank coffee were 17% less likely to die an early death, 19% less likely to die of heart disease and 18% less likely to develop cancer, compared to people who did not drink coffee.

Courtesy of Harvard School of Public Health

How does coffee work? The active ingredient in coffee is caffeine. Caffeine stimulates your brain and increases your alertness. Coffee also contains a lot of antioxidants, which are molecules that prevent damage that can cause cancer. Reactive molecules called “free radicals” attack our body and damage cells. Antioxidants stabilizes the oxidants, thus stopping them from harming our body!

David Heber, director of Center of Human Nutrition, UCLA discusses the effects of coffee.

Okay, now we know coffee can be healthy, but we also know that too much of anything is bad. How much coffee is too much coffee? Health Canada recommends adults limit caffeine intake to no more than 400mg/day. This is approximately three 8-ounce cups of coffee. Surpassing these limits could result in increased heart rate, changes in sleep patterns, heartburn, and more.

Remember that it in order to maximize coffee’s health benefits, minimize the amount of cream and sugar you put in your coffee. Sugar can singlehandedly nullify the positive effects you would get from coffee.

Robert Poole, the lead author of this study, says that these findings are “reassuring for coffee drinkers, as long as they drink in moderation”. Future studies will ideally pinpoint which type of coffee beans will have the greatest health benefit.

By Misam Ibrahimi