13 Research-Backed Benefits of Coffee And Its Side Effects

For years the benefits of coffee have been widely debated.

Is it good or bad for the human body? Does it benefit the human body in the long run or does it harm it?

Some believe that coffee is bad for us, while others say that coffee is beneficial to us, but as far as science is concerned, drinking coffee in moderation is beneficial.

If you’re a coffee-lover, this is good news for you, but if you still have doubts, or if you’re wondering what the benefits of drinking coffee are, here are 13 health benefits of drinking your favorite morning cup – and yes, they’re all research-based!

13 Research-Backed Benefits Of Coffee

benefits of coffee

1) Coffee can help you burn fat

According to research, caffeine can increase your metabolic rate by around 3-11%. Metabolic rate is one major factor in burning fat and keeping your body fit. When you drink coffee, the caffeine stimulates your nervous system which then signals to your fat cells to break down fat.

2) It boosts your energy for the day

You probably already know this, just from experience, but one of the major benefits to coffee is the energy boost it provides. While it does provide an energy boost, there is research backing the benefits of caffeine as a whole for the human body. Caffeine’s health benefits explained include its potential to improve cognitive function and enhance physical performance. Many studies suggest that moderate caffeine consumption can lead to increased alertness and improved reaction times. Additionally, caffeine may even play a role in reducing the risk of certain diseases, making it a topic worth exploring further.

Once you drink coffee, its caffeine will induce what is called “brain hypoperfusion,” which simply means your brain’s energy metabolism will increase while simultaneously decreasing blood flow. This process releases norepinephrine, a chemical responsible for making one more alert.

As you will later see, this energy-boosting benefit of coffee does not only keep us awake for whatever reason we are using it for but it benefits our whole body and brain as well when used in moderation.

3) Coffee contains essential nutrients

Coffee goes beyond boosting our energy level and providing us with a nice hot morning drink; it also contains some of the essential nutrients our bodies need.

According to SELF Nutrition Data, a single cup of coffee contains:

·  Riboflavin (vitamin B2): 11% of the Reference Daily Intake (RDI).

·  Pantothenic acid (vitamin B5): 6% of the RDI.

·  Manganese and potassium: 3% of the RDI.

·  Magnesium and niacin (vitamin B3): 2% of the RDI.

The percentages may not seem very large, but they add up at the end of the day. Besides, if you drink coffee regularly, you’re getting these vitamins regularly as well.

4) Coffee can enhance your physical performance

Caffeine helps in breaking down your body fat and converting it into fuel. Since your body fat is converted into fuel, aside from actually burning your fat, you become more energetic for the day.

Also, caffeine can increase the adrenaline in your body as well – which prepares your body for any intensive activities. If you’re planning to go to the gym or simply want to increase your mood, a cup of coffee will help a lot!

5) Coffee helps you in post-workout recovery

Now that you know that coffee can help boost your physical performance, it’s important to note that it can also aid in workout recovery. If you’re a bodybuilder or just someone who likes to work out, but especially if you lift weights, you’ll be glad to know that coffee helps in the recovery process as well.

Typically, after a hard workout, your muscles can be sore up to three days after. Coffee can reduce this pain. In a study done by the University of Georgia, they found that around two cups of coffee can reduce post-workout pain by up to 48%.

Because coffee aids in pain relief, you can also achieve a higher number of repetitions during your workout, allowing you to achieve more in your workouts.

5) Coffee is good for the brain

The benefits of coffee do not end with the metabolism in our body. The human brain can also benefit from a moderate dose of caffeine from coffee.

For one, coffee boosts our overall cognitive function. 

Once you drink coffee, the caffeine from the drink enters your bloodstream. After that, it travels to the brain – wherein it will block inhibitory neurotransmitter adenosine. Once caffeine blocks adenosine, neurotransmitters like norepinephrine and dopamine are produced, which enhances the energy of neurons.

In other words, coffee improves your cognitive functions which can include improved mood, enhanced memory (short and long term), more alertness, and general cognitive functions.

Speaking in long-term implications, coffee is also said to help in battling Parkinson’s disease, Alzheimer’s disease, and dementia which all impair cognitive response.

6) Coffee can reduce your risk of cancer

Not only can coffee help with battling long-term cognitive diseases like Parkinson’s disease, Alzheimer’s disease, and dementia but it can also help protect you from liver and colorectal cancer.

According to studies, consuming two cups of coffee a day can lower your liver cancer risk by up to 40%, whereas if you drink 4-5 cups of coffee per day, your chances of getting colorectal cancer are only lowered by 15%.

7) Coffee can also protect your liver

The liver is one of the most important organs we have in our bodies. Just like other key organs, a damaged liver can be very fatal to our health (think of hepatitis). Consuming moderate amounts of coffee can lower the risk of liver diseases immensely.

Aside from lowering your chances of developing liver cancer, studies show that drinking around 4 cups of coffee per day can lower your chance of getting cirrhosis – a condition in which your liver is replaced by scar tissue, by up to 80%.

8) Coffee can lower your risk of heart disease

One benefit of drinking coffee that is widely debated is the relationship to heart disease. One study reported by the American Heart Association demonstrated that women who regularly drink coffee have a reduced risk of heart disease.

For stroke, some studies show that people who drink coffee regularly have a reduced risk of stroke by around 20%. However, if you have elevated blood pressure, be wary of your intake, because it can spike it even higher.

9) Coffee can lower your risk of diabetes

According to some studies, coffee drinkers have a reduced risk of type 2 diabetes by around 20-50%. One study claims that drinking coffee can reduce your risk as much as 67%. 

Nevertheless, it depends on how much sugar you put into your drink. It’s important to remember that a cup of coffee filled with sugar will negate all positive benefits.

10) Coffee is good for your oral health

Coffee is not only good for our body and mind but it is also good for our smile.

It not only protects your teeth by destroying bacteria that can harm your teeth, one of which being Streptococcus mutans. S. mutans is a bacteria that consequently causes dental cavities which are very bad for your teeth.

According to one study, regular consumption of coffee can inhibit this bacteria, S. mutans, and others, from developing on your teeth by around 40%.

Also, one tip to drinking coffee — if you drink your coffee hot, don’t drink it with cold water, it can damage your teeth due to sudden temperature change. This also applies vice-versa.

11) Coffee is one of the largest sources of antioxidants

This may surprise some of you, but coffee provides your body with a plethora of antioxidants. According to some studies, coffee has more antioxidants than various fruits and vegetables combined!

Of course, it does not mean you should ditch your fruits and veggies. It’s just that coffee has lots of antioxidants that you can benefit from.

12) Coffee can help in fighting depression

According to one Harvard study, women who drink around 4 or more cups of coffee per day have a reduced risk of becoming depressed by 20%.

The study also notes that individuals who drink 4 or more cups of coffee per day are 53% less likely to die by committing suicide. Since coffee can lower your tendency for depression, it can also make you increasingly happier daily.

13) Coffee is linked to longer life expectancy

Aside from all of the aforementioned benefits of drinking coffee, we can conclude that coffee can help you live longer. According to one study, for people ages 18-24, drinking coffee can reduce the risk of death – 20% reduced risk for men and 26% reduced risk for women.

Negative Side Effects of Drinking Coffee

what is healthy coffee

Although the health benefits of drinking coffee are plentiful, it does not mean that you should binge-drink it. Too much coffee can come with some negative side effects as well, including:

·  Anxiety

·  Muscle breakdown

·  High blood pressure

·  Rapid heart rate

·  Fatigue

·  Caffeine addiction

This may sound contrary to the ones listed above, but keep in mind that this usually happens if you only drink too much coffee. The way a person prepares their coffee also has a significant impact as well, with a sugary coffee hurting your oral health, increasing your risk of diabetes, and more.

As with most things in life, moderation is key to reaping the benefits of coffee. You can also make your coffee even more beneficial to your body by adding various supplements to it. Here we detail 9 ways that you can make your coffee healthier and more beneficial for your body.

Now that you know that your favorite morning drink is loaded with health benefits, it’s time to enjoy your coffee even more!


We matched one coffee to each mood and moment below. Tap the image or the coffee name to see it on Amazon. We chose these from each roaster’s published details rather than from brewing them ourselves yet, so both are labeled research-rated. As an Amazon Associate we earn from qualifying purchases.

Feeling clear-headed: a moderate morning cup

Clay bowl of light roast Ethiopian beans beside a ceramic pour-over with blueberries and jasmine flowers on linen.

Our pick: Volcanica Coffee Ethiopian Yirgacheffe, USDA Organic, medium-light roast, whole bean, 16 oz. A floral cup for the moderate daily coffee this article describes. Research-rated, not yet brewed by our team.

Feeling grounded: an everyday Fair Trade mug

Burlap sack of medium roast Arabica beans beside a ceramic pour-over, caramel and chocolate on a wooden table.

Our pick: Volcanica Coffee Colombian Supremo, medium roast, Fair Trade, whole bean, 16 oz. A balanced daily mug that fits the research-backed benefits above. Research-rated, not yet brewed by our team.

How Capitol City Coffee Rates Coffee and Coffee Machines

Every coffee and coffee machine we recommend is scored on the same 100-point scale, so a recommendation on one page means the same thing as a recommendation on any other. Each pick is also labeled with how we reached its score.

Research-ratedScored from the roaster or manufacturer’s published specifications, independent results such as Coffee Review blind cuppings and SCA brewer certification, and patterns across verified buyer reviews. Most of our current picks are research-rated.
Hands-on testedThe Capitol City Coffee team has brewed the coffee or used the machine ourselves, following the testing steps below. We only use this label when that testing actually happened, and we show the date we tested.

Coffee beans: 100-point scale

What we scorePointsWhat we look at
Origin and sourcing transparency20Country, region, farm or cooperative, altitude, bean variety, and processing method are clearly disclosed.
Flavor evidence25Independent cupping scores, how closely the tasting notes match what the origin is known for, and our own cupping notes when hands-on tested.
Roast and freshness15Roast level stated, roast-date practices, whole-bean availability, and packaging with a one-way valve or resealable bag.
Brew versatility15How well the roast suits pour-over, drip, French press, cold brew, and espresso.
Value15Price per ounce compared with similar single-origin coffees or blends.
Buyer feedback10Volume and consistency of verified reviews, and recurring complaints about staleness, bitterness, or shipping.

Coffee machines and gear: 100-point scale

What we scorePointsWhat we look at
Brewing performance25Water temperature in the 195–205°F range, even extraction, and SCA certification or published test data.
Build quality and reliability20Materials, known failure points, and long-term owner reports.
Ease of use and cleaning15Setup, the daily routine, descaling, and dishwasher-safe parts.
Fit for your kitchen10Capacity, counter footprint, and noise.
Useful features10Programming, grind and temperature control, and carafe type. Features that improve the cup count more than extras that do not.
Value10Price compared with machines that perform similarly.
Warranty and support10Warranty length, parts availability, and how the brand handles repairs.

What the grades mean

ScoreGradeWhat it means
90–100AExceptional. Our first recommendation for the feeling and setting described.
80–89BStrong. Excellent, with minor trade-offs we explain.
70–79CGood. Worth it for specific needs, with clear compromises.
Below 70—Not recommended. We do not feature these as picks.

How we test hands-on

When a pick carries the Hands-on tested label, this is the method behind it, and we note the date we tested.

  1. Coffee: brewed fresh from whole beans following Specialty Coffee Association guidelines (water between 195 and 205°F, about 1 gram of coffee to every 15 to 18 grams of water) in the brew methods the roast suits best, such as pour-over, French press, or espresso. We taste it black first, then with milk if that is how most people drink it, and each taster scores it on their own before we compare notes.
  2. Machines: used in our everyday routine rather than a single demo. We brew both full and small batches, check the brewing temperature and brew time, and run the cleaning or descaling steps the manual calls for.

How we choose the feeling and setting

We match each coffee to a mood and a moment based on its flavor profile and roast. Bright, citrusy light roasts suit energizing mornings. Chocolatey, full-bodied medium roasts suit slow or social moments. Richer roasts suit espresso and milk drinks. Each pick explains which facts led us to that match.

Our scores stay independent

Every score comes only from the criteria above. No brand can pay for a pick or a higher grade. We re-check ratings when a roast, listing, or model changes, and update or remove picks that no longer earn their grade.

Some links on this page are affiliate links. As an Amazon Associate, Capitol City Coffee earns from qualifying purchases, at no extra cost to you.

Questions about a rating? Reach the Capitol City Coffee team through our contact page.