Updated August 21, 2026

Ah, coffee. Whether you are cradling a travel mug on your way to work or dashing out after Pilates class to refuel with a skinny latte, it’s hard to imagine a day without it. The caffeine perks you up, and there’s something incredibly soothing about sipping a steaming cup of joe. But is drinking coffee good for you? Gabrielle Judd, M.S., R.D., C.I.S.S.N., a dietitian at Johns Hopkins Bayview Medical Center, discusses science-backed claims about coffee and how to enjoy it in moderation.

What are the top health benefits of drinking coffee?

Your brew gives you benefits beyond an energy boost. Here are the top ways coffee can positively impact your health:

1. Your liver will thank you.

   Coffee has a protective effect on the liver. Research shows that coffee drinkers are more likely to have liver enzyme levels within a healthy range than people who do not drink coffee.

   Research also shows an inverse association between coffee consumption and hepatocellular carcinoma risk. “This means that drinking more coffee of any type, including decaffeinated and instant coffee, reduces the risk of this type of cancer, as well as chronic liver disease,” Judd explains. This risk reduction is estimated at 41%–53%.

2. Your body may process glucose (sugar) better.

   That’s the theory behind studies that found that people who drink coffee are less likely to develop type 2 diabetes. Coffee beans contain compounds called polyphenols that help lower inflammation and provide antioxidant benefits. These compounds can help improve the body’s insulin response, leading to better blood sugar control over time. “Polyphenols are found in both caffeinated and decaf beans, but the roast matters because heat degrades these micronutrients,” Judd explains. Darker roasts have less polyphenols while lighter roasts retain more.

   “It is important to remember that added sugar increases blood sugar and decreases insulin sensitivity, counteracting the positive effects of polyphenols,” Judd cautions. Therefore, choosing coffee with low or no added sugar will maximize these benefits.

3. Your kidneys will stay healthy longer.

   Studies have found that people who drink coffee regularly tend to have a lower risk of chronic kidney disease, protein in the urine (an early sign of kidney damage) and severe kidney problems later in life. Researchers believe coffee’s natural compounds, including antioxidants, may help reduce inflammation and cell damage, while supporting blood sugar control and heart health, two important factors that affect the kidneys.

   “However, If you have existing kidney disease, it’s best to follow your doctor’s advice, especially if they have concerns about caffeine, blood pressure or other dietary restrictions,” Judd recommends.

4. Coffee and heart health go hand in hand.

   Research shows that for most healthy adults, drinking one or two cups of coffee a day may help ward off heart failure (weakened heart muscle), atrial fibrillation and high blood pressure, as well as heart disease (coronary artery sclerosis) to some degree. However, how you brew your coffee matters, especially for heart disease.

   Coffee has natural oils that contain fatty molecules called cafestol. This compound is known to increase cholesterol, including LDL (bad) cholesterol. When coffee is brewed using a paper filter, cafestol is trapped in the paper and does not make its way into your cup. Unfiltered preparation methods, such as French press or use of mesh filters do not stop this molecule. These methods are linked to increased LDL cholesterol and higher risk of death from heart disease. “So, to achieve the best heart benefits from coffee, chose paper filtered brewing methods,” Judd recommends.

5. You are less likely to develop Parkinson’s disease.

   Caffeine is not only linked to a lower chance of developing Parkinson’s disease, but it may also help slow disease progression. Scientists believe caffeine may help protect brain cells, but the exact mechanism is unknown. Some studies suggest that caffeine helps block certain receptors in the brain, which helps improve brain signaling. Other theories explore how caffeine can dampen inflammation in the brain and protect neuron function, especially for neurons involved in movement. While coffee is not a guaranteed preventive measure, the evidence linking caffeine consumption to a lower Parkinson’s risk is among the strongest and most consistent of coffee’s reported health benefits.

6. Your odds of getting certain cancers could be lower.

   Research consistently shows that coffee drinkers may be less likely to develop certain cancers. The strongest evidence is related to:

   • Liver cancer (hepatocellular carcinoma)
   • Endometrial (uterine) cancers
   • Colorectal cancer
   • Prostate cancer
   • Certain skin, mouth and throat cancers

7. Your risk of getting dementia could go down.

   Caffeine in a few cups of coffee may provide significant protection against developing dementia. In fact, researchers found that people who drank two to three cups of coffee a day had reduced cognitive decline, showed better cognitive function and were less likely to develop dementia compared with those who consumed little or no caffeine. “In this case, it matters that the coffee (or tea) is caffeinated, because researchers did not observe the same benefit from decaf beverages,” Judd points out.

   There is also evidence that coffee may help reduce the risk of Alzheimer’s disease, although the strongest evidence is for dementia prevention. Researchers believe coffee’s combination of caffeine and antioxidant compounds may help support long-term brain health.

8. Coffee can help you live longer

   To sum it up, research studies consistently show that coffee drinkers are less likely to die from some of the leading causes of death, including heart disease, stroke, diabetes and kidney disease. Although coffee cannot magically add years to your lifespan, it can offer protection from some of these potentially fatal conditions.

   While coffee is a pleasurable part of your lifestyle, there are other factors that make a bigger impact on your health such as eating a balanced diet, exercising and maintaining a healthy weight. But drinking coffee is a delightful addition to those key health factors.

How much coffee is safe to drink every day?

Most research on coffee benefits recommends moderate coffee consumption defined as 2–4 cups a day. “Keep in mind that a cup is referring to a measurement (8 ounces) rather than a drinking vessel,” cautions Judd. This means that 2–4 cups equal 16–32 ounces.

If coffee is not your only pick-me-up during the day, be sure to account for other caffeinated beverages such as tea, soda and energy drinks. The Dietary Guidelines for Americans advise that healthy adults limit total daily caffeine to 400 milligrams — that’s including all sources of caffeine. Caffeine content can vary depending on the type of coffee, but an average 8-ounce cup has 95 milligrams.

People who are pregnant or breastfeeding should check with an obstetrician regarding the recommended coffee intake.

Can you have too much coffee?

Research suggests that coffee’s greatest health benefits occur at moderate intake, typically around 2–4 cups per day. Drinking substantially more than that does not appear to offer additional benefits and may increase the risk of side effects, including:

• Jitteriness
• Increased heart rate
• Raised blood pressure
• Increased sweatiness
• Anxiety
• Trouble falling asleep

“The effects you get from caffeine also have to do with genetics,” Judd notes. There are genes that affect how the body metabolizes caffeine and those that determine how the brain responds to it. People who metabolize caffeine slowly are more sensitive to caffeine effects than fast metabolizers.

“Listen to your body instead of comparing your coffee habit to others, to help determine the right amount of coffee for you,” Judd advises. If coffee gives you the jitters or affects your sleep, adjust your routine. You can still get some of the health benefits by drinking one cup of coffee a day, or even decaf or half-caf. Healthy sleep is especially important because chronic sleep disruption can offset many of the coffee benefits.

Is black coffee healthier than other coffee drinks?

What you add to your coffee can make a difference in how healthy your drink really is. Drinking coffee black usually means not adding anything else to it, including milk products, sweeteners and flavored syrups. This results in fewer calories per cup and fewer sugars and fats, which is healthier than loading your coffee with cream and sugar.

However, there are healthy choices to flavor your coffee if black is not your style. Instead of heavy cream, try adding up to two tablespoons of milk, milk substitute or half-and-half. And instead of sugar, opt for naturally sweet spices and flavorings. Try stirring in one-quarter teaspoon of the following for extra flavor:

• Vanilla extract
• Cardamom
• Cinnamon
• Cocoa powder

Medically reviewed by Gabrielle Judd, M.S., R.D., C.N.S.C., L.D.N., C.I.S.S.N.