Tea and coffee have known health benefits, but now we know they can work together.
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- A new study finds drinking large amounts of coffee and tea lowers the risk of death in some adults by nearly two thirds.
- This is the first study to suggest the known benefits of these drinks are additive.
- The findings are great, but only directly apply to certain people.
Maybe you should enjoy this article with a cup of coffee or tea.<p> The <a href="https://drc.bmj.com/content/8/1/e001252?T=AU" target="_blank" rel="noopener noreferrer">study</a> involved 4,923 type 2 diabetics living in Japan. The average participant was 66 years old. All of the participants were taken from the rolls of the Fukuoka Diabetes Registry, a study geared at learning about the effects of new treatments and lifestyle changes on the health of diabetics. <br> <br> The participants filled out questionnaires concerning their health, diet, habits, and other factors. Among the questions were two focused on determining how much green tea or coffee, if any, the participants consumed over the course of a week. The health of the participants was recorded for five years. During this time, 309 of the test subjects died from a variety of causes. <br> <br> Subjects who drank more than one cup of tea or coffee per day demonstrated lower odds of dying than those who had none. Those who consumed the most tea and coffee, more than four and two cups a day, respectively, enjoyed the most significant reductions in their risk of death. This level of consumption was associated with a 40 percent lower risk of <a href="https://www.sciencedaily.com/releases/2020/10/201020190129.htm" target="_blank" rel="noopener noreferrer">death</a>. </p><p>Most interestingly, the effects of drinking tea and coffee appear to combine to reduce risk even further. Those who reported drinking two or three cups of tea a day and two or more cups of coffee were 51 percent less likely to die during the study, while those who drank a whopping four or more cups of tea and two or more cups of coffee had a 63 percent lower risk of <a href="https://www.medicalnewstoday.com/articles/diabetes-coffee-and-green-tea-might-reduce-death-risk" target="_blank" rel="noopener noreferrer">death</a>. </p>
So, should I start swimming in a vat of coffee and green tea?<iframe width="730" height="430" src="https://www.youtube.com/embed/LY0E-JQxeoY" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><p> Not quite. </p><p> The primary takeaway from this study is that Japanese adults with type 2 diabetes who drink a lot of green tea and/or coffee die less often than similar people who do not. If this effect is caused by something in the drink, lifestyle choices people who drink that much tea all make, or something else remains unknown. The finding must be considered an association at this point. <br> <br> The eye-popping reductions in mortality rates are compared to the risk of death of others in the study. The people who died reported drinking less tea and coffee than those who lived. Unless you have several demographic and conditional similarities to the subjects of this study, you probably won't suddenly be at a two-thirds lower risk of death than your peers because you drink green tea. </p><p> Like all studies that depend on self-reporting, it is also possible that people misstated how much they consumed any one item. The study also did not look into other factors like socioeconomic status or education level, also known to impact death rates and potentially linked to coffee and tea consumption. </p><p> However, it is yet another study in the pile that suggests that <a href="https://www.healthline.com/nutrition/top-13-evidence-based-health-benefits-of-coffee" target="_blank" rel="noopener noreferrer">coffee</a> and <a href="https://www.healthline.com/nutrition/top-10-evidence-based-health-benefits-of-green-tea" target="_blank" rel="noopener noreferrer">green tea</a> are good for you. That much is increasingly <a href="https://www.health.harvard.edu/press_releases/health-benefits-linked-to-drinking-tea" target="_blank" rel="noopener noreferrer">agreed</a><a href="https://www.rush.edu/health-wellness/discover-health/health-benefits-coffee" target="_blank" rel="noopener noreferrer"> upon</a>. This study also suggests the benefits are additive, which is a new development.</p><p><br> So, while it isn't time to start the IV drip of green tea, a cup or two probably won't <a href="https://www.webmd.com/diabetes/news/20201022/coffee-green-tea-might-extend-life-for-folks-with-type-2-diabetes" target="_blank" rel="noopener noreferrer">hurt</a>. </p>
Your morning coffee is good for you - if you drink it at the right time.
- Caffeine, the main stimulant found in coffee, works on a chemical level to give you energy by replacing the biochemical adenosine, which makes you tired.
- There are many health benefits to caffeine, such as a boost in metabolism and an increase in physical performance/muscle strength.
- To get the most positive impacts of your daily caffeine intake, drink coffee between 10 in the morning and 12 noon or between 2 in the afternoon and 5 in the evening.
Your brain on coffee<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="1b7784d7ec18a202dd02c5c97e1499d4"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/4YOwEqGykDM?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span><p><a href="https://www.healthline.com/nutrition/what-is-caffeine" target="_blank">Caffeine</a>, the main stimulant in coffee, works on a chemical level to give you a boost of energy. However, caffeine is structurally similar to another chemical naturally created in the body, called <a href="https://www.webmd.com/vitamins/ai/ingredientmono-1067/adenosine" target="_blank">adenosine</a>, which makes you tired.</p><p>Some substances imitate natural neurotransmitters and can take their place in receptors. For example, morphine can bind to the receptors in the brain meant for your endorphins (which is a natural kind of 'morphine' produced by your brain). </p><p><strong>Caffeine replaces adenosine, which builds your adrenaline and causes dopamine to linger longer.</strong></p><p>Similar to how morphine binds to endorphin receptors, the caffeine in your morning coffee binds to your brain's adenosine receptors, preventing the biochemical from making you tired. </p><p>Caffeine also builds your adrenaline supply which increases your heart rate and allows blood to pump faster. At the same time, caffeine prevents dopamine from being reabsorbed into your system, which allows it to linger in the brain for a longer amount of time, causing you to feel it's positive effects (such as happiness) for a longer amount of time. </p><p>This lingering of dopamine is what often triggers the brain to crave more caffeine. After all, while dopamine itself <a href="https://www.psychologytoday.com/us/blog/women-who-stray/201701/no-dopamine-is-not-addictive" target="_blank">isn't inherently addictive</a>, it does play a large role in many addictions. </p><p><strong>More coffee means more adenosine receptors which means more coffee...</strong></p><p>The brain is a complex and intricate system. The more coffee you drink, the more adenosine receptors are formed, meaning it can take more coffee to keep you awake now than it did when you started drinking coffee as a young adult. </p><p><strong>According to<a href="https://www.outsideonline.com/2390099/overdosing-caffeine" target="_blank">research</a>, caffeine has a half-life of around 6 hours. </strong></p><p>Within the first 10 minutes, the caffeine enters your bloodstream and is pumped throughout your body, causing an increase in blood pressure and heart rate. </p><p>Up to 20 minutes after intake, caffeine binds to the adenosine receptors, neutralizing fatigue. Dopamine levels increase and linger, which provides the drinker with an alert and focused feeling. </p><p>Within 30 minutes, your adrenal glands shift into high gear and begin producing more hormones. During this time your vision may become sharper due to your pupils dilating. </p><p>Within 40 minutes, your body begins producing more serotonin, which improves the neuron function within your spinal cord - this leads to improved coordination and muscle strength. </p><p>After 4 hours, your metabolism increases, which is why you burn energy faster. Your body begins to break down stored fats during this time. </p><p>Within 6 hours, the liquid coffee has gone through your system and you will likely feel the urge to urinate, during which time approximately half the caffeine you consumed is expelled. </p>
How to make your coffee habit benefit you<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzIxMTYwMS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY3MjkyMjUzMH0.-aKCrd265VKKDjI2g8QruGKdXs6i2RIcYSeRdygZwLY/img.jpg?width=1245&coordinates=0%2C72%2C0%2C72&height=700" id="9f1b6" class="rm-shortcode" data-rm-shortcode-id="3a409121a158d78aba0b22335d00f702" data-rm-shortcode-name="rebelmouse-image" alt="concept of coffee time coffee cup on blank background with clock" data-width="1245" data-height="700" />
What time of day you drink your coffee can mean the difference between a good habit and a bad habit.
Photo by bluehand on Shutterstock<p>Of course, with anything caffeinated, moderation is key. When consumed in excess, caffeine can cause anxiety, heart palpitations, and sleeping problems.</p><p>According to <a href="https://www.consumerreports.org/food-safety/too-much-caffeine/" target="_blank">Consumer Reports</a>, up to 400mg of caffeine per day (which equals two to four 8 ounce cups) can be part of a healthy diet, however anything over 600mg per day is too much. </p><p><strong>What are the health benefits of coffee? </strong></p><p>Despite what you may have been told, there are several ways your daily caffeine intake is good for you. Not only can coffee improve your energy levels, but it can cause your brain to function <a href="https://www.healthline.com/nutrition/top-13-evidence-based-health-benefits-of-coffee#section1" target="_blank">at optimal levels</a>, making you smarter. </p><p><u>Some other health benefits of coffee include: </u></p><ul><li>Boosting your metabolism</li><li>Improving your physical performance </li><li>Helping you with your nutrient intake (the vitamins B2, B3, B5, manganese, and potassium are all found in coffee)</li><li>Lowering your risk of developing type 2 diabetes</li><li>Helping fight depression symptoms and make you happier </li><li>Providing a source of antioxidants </li></ul><p><strong>Consuming caffeine when cortisol levels are high decreases the health benefits.</strong></p><p><a href="https://www.webmd.com/a-to-z-guides/what-is-cortisol" target="_blank">Cortisol</a>, a naturally-occurring stress hormone, has a very distinct circadian rhythm that is regulated by the brain's central pacemaker. Interrupting this rhythm can lead to metabolic abnormalities, fatigue, and poor quality of life, according to <a href="https://www.ncbi.nlm.nih.gov/pubmed/19223520" target="_blank">a 2009 study</a> published in the Journal of Clinical Endocrinology and Metabolism. </p><p>Consuming caffeine when your cortisol levels are at a natural peak can lead to interference in the production of cortisol and an increase in your tolerance, which can impact your response to stress and will cause to you need more and more caffeine as time goes on.</p><p><strong>When is the best time to drink coffee?</strong></p><p>The cortisol levels in your body are at a natural peak three times per day, one of which is in the early morning. According to <a href="https://time.com/3903826/coffee-early-morning-worst-time/" target="_blank">this article in Time Magazine</a>, the best times to drink coffee (or ingest caffeine) are between 10 in the morning and 12 noon, and then again between 2 in the afternoon and 5 in the evening. </p><p>This will allow your brain to make the most of your caffeine surge, as it's not replacing any other important functions, such as the cortisol release that naturally happens several times per day. </p>
Our favorite over-the-counter medication has its limits.
- A study of hundreds of thousands of people finds the upper safe limit for coffee consumption.
- Too much coffee puts drinkers at an increased cardiovascular risk.
- Say no to that seventh cup.
What the second look saw<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8xOTYyMjcxMC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYyOTAxMzA4NH0.L-N_NyJvkK_a7KkJB2xoTHfw2J2uoPI19e9897PFUZ8/img.jpg?width=980" id="be1ae" class="rm-shortcode" data-rm-shortcode-id="f9a12348747a2509a517477268e4f060" data-rm-shortcode-name="rebelmouse-image" />
Image source: Daria Shevtsova/Unsplash<p>Co-author of the study, <a href="http://people.unisa.edu.au/Elina.Hypponen" target="_blank">Elina Hyppönen</a> of the <a href="https://unisa.edu.au/research/cri/our-research/australian-centre-for-precision-health/" target="_blank">Australian Center for Precision Health</a>, <a href="https://www.unisa.edu.au/Media-Centre/Releases/2019/a-cup-of-joe-and-youre-good-to-go-under-6-a-day-and-youre-a-ok/" target="_blank">says</a>, "Coffee is the most commonly consumed stimulant in the world — it wakes us up, boosts our energy and helps us focus — but people are always asking 'How much caffeine is too much?'" Hyppönen and her co-author <a href="http://people.unisa.edu.au/Ang.Zhou" target="_blank">Ang Zhou</a> analyzed the Biobank data for over 347,077 people, aged 37-73, including their genetic profile, medical history, diet, exercise activity, and, of course, their coffee consumption. They found that those who drank more than six cups daily had a 22% higher risk of heart disease or stroke.</p><p>"Most people would agree that if you drink a lot of coffee, you might feel jittery, irritable or perhaps even nauseous — that's because caffeine helps your body work faster and harder, but it is also likely to suggest that you may have reached your limit for the time being." This corresponds to a temporary rise in blood pressure coffee brings on. However, this increase stuck with those who imbibed 7 cups or more, putting them at the higher cardiovascular risk.</p>
Nothing exceeds like excess<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8xOTYyMjcyMS9vcmlnaW4uZ2lmIiwiZXhwaXJlc19hdCI6MTY0OTY3ODM2OH0.TQTUtSMo8KhbEdTo3pfiy-b1cG5gvZSYERf9_z78Tqo/img.gif?width=980" id="ca655" class="rm-shortcode" data-rm-shortcode-id="aa22e5ab7cc9679377df4c28279b1dca" data-rm-shortcode-name="rebelmouse-image" />Giphy<p>"An estimated three billion cups of coffee are enjoyed every day around the world," notes Hyppönen. And that's not a bad thing, especially for those of us who need to stay alert at work (spoiler alert — all of us). Still, she says, "As with many things, it's all about moderation; overindulge and your health will pay for it." For any of our little daily vices, "Knowing the limits of what's good for you and what's not is imperative."</p>
The long-raging debate over hot coffee versus iced coffee may soon be settled with this news.
- Hot coffee is found to have high-levels of antioxidants, unlike cold brew.
- Coffee consumption means a decreased risk of liver disease, amongst others.
- Why this is remains somewhat unclear, but the data is piling up.
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