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www.caffeineinformer.com/harmful-effects-of-caffeine

Nov 9, 2017 ... Harmful effects of caffeine are often hard to find. Here are 20+ studies that concluded that caffeine could be potentially dangerous to one's health.

www.medicalnewstoday.com/articles/271707.php

Oct 28, 2015 ... This is considered to be a moderate caffeine intake, which according to many studies, can promote a variety of health benefits. But some studies claim otherwise, even suggesting that one or two cups of coffee a day may negatively impact our health. So, what are we to believe? We analyze the potential ...

www.healthline.com/nutrition/caffeine-side-effects

Aug 14, 2017 ... However, high doses of caffeine may have unpleasant and even dangerous side effects. Research has shown that your genes have a major influence on your tolerance to it. Some can consume much more caffeine than others without experiencing negative effects (5, 6). What's more, individuals who aren't ...

www.healthline.com/health/caffeine-effects-on-body

But caffeine does so much more than just keeping you awake.It's a central nervous system stimulant that affects your body in numerous ways. Knowing the symptoms of caffeine and its long-term effects on your body may make you think twice about having that fourth cup of coffee. Read on to learn more about these effects.

www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/caffeine/art-20045678

Mar 8, 2017 ... How you react to caffeine may be determined in part by how much caffeine you're used to drinking. People who don't regularly drink caffeine tend to be more sensitive to its negative effects. Other factors may include genetics, body mass, age, medication use and health conditions, such as anxiety disorders.

www.aarp.org/health/healthy-living/info-10-2013/coffee-for-health.html

That cup of coffee may be good for many, but there are downsides as well. Read the good (and bad) news about caffeine.

www.healthambition.com/negative-effects-of-coffee

Coffee is America's favorite drug with around 180 million of us starting most days with a caffeine jolt to get going. Some people enjoy their coffee and apparently have no health issues with drinking it. There are however some potential negative effects of coffee, particularly at certain times and when it becomes so addictive ...

www.livestrong.com/article/277715-negative-effects-of-caffeine-on-the-body

Caffeine is used around the globe, with 90 percent of people worldwide consuming it in some form and 80 percent of Americans using it daily, according to the U.S. Food and Drug Administration. One of caffeine's most obvious biological effects is making you feel awake. Less desirable effects include increased heart rate, ...

www.webmd.com/vitamins-supplements/ingredientmono-979-caffeine.aspx

People with voice disorders, singers, and other voice professionals are often advised against using caffeine. However, until recently, this recommendation was based only on hearsay. Now developing research seems to indicate that caffeine may actually harm voice quality. But further study is necessary to confirm these ...