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The Health Benefits of Coffee: What Science Really Shows

January 04, 2017

It's the start of a New Year, and a great time to set intentions, create resolutions, and form new habits. 

It's no secret that we love our coffee. Not just us, but Americans in general—we drink about 400 million cups of it every day. An estimated 83% of American adults drink coffee, averaging about three cups a day.

Why do we love coffee so much? Most people would probably answer that they use coffee to wake them up in the morning, or provide a little pick-me-up in the afternoon. Most would also agree they love the taste. For Ally and I, we love the ritual of making coffee for each other at home, and the coziness it brings.

But Sanjiv Chopra, MD, might have given us the best reason to drink coffee. In his book, The Big Five: 5 Simple Things You Can Do to Live a Longer, Healthier Life, Dr. Chopra establishes the easiest research-supported ways to improve our health on a daily basis. Number one on his list: drink coffee.

In this adapted excerpt, Dr. Chopra explains (you can also listen to a podcast with Dr. Chopra on the subject here):

"Few people drink coffee for the most important reason: Coffee is really good for you. I make that statement as a physician, and liver specialist. In fact, coffee actually may well be the healthiest beverage you can drink.

Many people don’t believe that. When I make that statement they sometimes look at me like I’ve told the beginning of a joke and they are waiting for the punch line. In fact, instead of believing coffee is good for you, most people believe it can be harmful. In the past, drinking too much coffee supposedly had been linked to a variety of health problems including heart attacks, birth defects, pancreatic cancer, osteoporosis, weight gain, hypertension, and miscarriage. We do know that in some instances coffee can cause insomnia, tremors, raise blood pressure a tad, and worsen heartburn, and it certainly increases urination.

So for those reasons, people usually limit the amount of coffee they drink and often decide that for health reasons they shouldn’t have that extra cup of coffee they're craving.

The evidence that they are misinformed is overwhelming—and more of it is being reported practically every day.

Chemex coffee | Chemex and ceramic mug on kitchen table | Canyon Coffee

What the science really shows

Few people consider coffee a health drink. In fact, most people don’t even know how effective coffee appears to be in preventing a variety of very serious illnesses, or, when they learn the facts, they remain quite dubious. They ask incredulously, “You’re saying coffee is probably better for me than tea? Coffee really can reduce the risk of developing a number of common cancers? It can decrease the risk of developing gallstones and tooth decay? It decreases the risk of developing cirrhosis of the liver? It can even decrease the risk of developing dementia? Dr. Chopra, are you nuts?”

The facts are indisputable; coffee appears to offer a great variety of benefits, including substantial protection against liver cirrhosis, type 2 diabetes, heart disease, Parkinson's disease, cognitive decline and dementia, gallstones, tooth decay, and a host of common cancers, including prostate, colon, endometrial, and skin cancer. There also is a lower rate of suicide among coffee drinkers.

But perhaps the single most startling conclusion that has emerged from the more than 19,000 studies (emphasis added) concerning the impact of coffee on health is that people who drink a lot of coffee appear to live longer than people who drink little or no coffee. That's an incredible statement, but there are several good studies that support it. For example, a Johns Hopkins Bloomberg School of Public Health review of 21 studies conducted between 1966 and 2013 that included almost one million participants concluded that people who drank as many as four cups of coffee daily reduced mortality by 16 percent.

I've become a true advocate of the health benefits of coffee.

How much should you drink?

Recommendations about how much coffee to drink vary. Personally, I love coffee and will drink as many as four or five cups a day, usually with skim milk or black but without a sweetener (emphasis added). According to Dr. van Dam of the Harvard School of Public Health, as long as your body can tolerate it there are no negative effects associated with drinking up to six eight-ounce cups of caffeinated coffee (one hundred milligrams) a day. The Mayo Clinic reports that four cups “appears to be safe for most healthy adults.” The American Medical Association points out that two to three eight-ounce cups is about average but that ten cups is an excessive amount.

The AMA also reminds Americans that when coffee is loaded with sweeteners and taste enhancers it can silently add to obesity. The U.S. Food and Drug Administration reports that four hundred milligrams of caffeine, found in four cups of coffee, is a safe amount of caffeine for healthy adults—then reminds people that they might also be getting caffeine from a variety of other products, including soda, chocolate, and even some gum.

So the best answer is that there is no best answer. For most Americans the amount of coffee you are drinking now is the right amount. If it doesn’t cause you any physical distress, please continue enjoying your coffee."


We will, Dr. Chopra :)

Girl holding cup of coffee on sidewalk | Canyon Coffee

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