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Is Black Coffee Good for Diabetics? Truth Revealed!

Nowadays, coffee includes many synthetic products that have various impacts on the body. Some are beneficial for people with diabetes, but many are not.

So, is black coffee good for diabetics?

To answer this, you have to learn about black coffee’s effects on the blood glucose level. Along with that, you should know about the nutritional values of black coffee to further your understanding. With that, you’ll be able to link with the prevalence of diabetes.

Still, how do we fix one’s habit of drinking coffee regularly? What happens if you drink black coffee every day? Keep reading to know more!

Table of Content

Black Coffee and Diabetes

Who does not like coffee? That tempting smell of freshly made black coffee can make anyone crave a cup!

Coffee was once criticized as being harmful to our health. Today, experts say that coffee can reduce internal inflammation and protect against illnesses. Yet, black coffee can still cause dangers to people who have pre-existing type 2 diabetes.

Black coffee and diabetes – Does black coffee help diabetes? Infographic

What is Black Coffee?

Black coffee is a drink made from roasted coffee beans. The beans will soak in water for hours, resulting in their flavor and color. Many people enjoy a strong cup of black coffee as it has a tinge of bitter taste compared to other drinks.


When should I drink black coffee? In many countries, coffee remains a national beverage for breakfast. It’s preferred in the daytime as the caffeine content can boost your energy level.

Otherwise, is black coffee better, hot or cold? To be honest, it depends on your personal choice. But by scientific means, the level of antioxidants in hot coffee is higher. So it is somewhat healthier than the cold ones!

Nutritional Values of Black Coffee

If you are searching for a beverage that has low calories, black coffee is the ideal one! It contains only 2 kcal per 100ml.

Besides, variation in the cup sizes may affect the value, too. 

Did you know that the type of water used may affect the micronutrient content? Hard water contains calcium and magnesium.


Meanwhile, soft water lacks these harsh minerals that can harm your body. The nutritional profile of 100 ml of medium strength black coffee includes:

  • Fat – 0mg
  • Cholesterol – 0mg
  • Carbohydrates – 0mg
  • Sugar – 0mg
  • Sodium – Trace
  • Potassium – 92mg
  • Magnesium – 8mg
  • Niacin – 0.7mg
  • Manganese – 0.05mg
  • Riboflavin – 0.01mg

Keep in mind that the calories in black coffee differ according to the brewing method. So, it does not suggest that it is 100% healthy.

Is Black Coffee Good for Diabetics?

Let’s address the main issue then: Is black coffee good for diabetics?

Coffee may reduce your chance of having type 2 diabetes. But if you have diabetes, it may affect your glucose level.

Drinking coffee becomes a problem when you mix sugar additives for diabetic patients. The addition of sugar or other sweeteners will influence the final nutritional value. Hence, it may raise the carbohydrate content and worsen your sugar level.

So, take note that coffee with sugar or creamer is harmful to your body. 

You may be wondering, which coffee is best for diabetics? The healthiest way to sip coffee is black, decaffeinated, or with natural sweetener.

Regardless, black coffee has a lot of benefits for the body. Let’s take a look at them.

Benefits of Black Coffee

What are the benefits of drinking black coffee? If you drink black coffee, here is some good news for you! Black coffee can control several symptoms and prevent health issues. For example, it may:

  • Boosts memory and intelligence
  • Help in weight loss
  • Improve mood in depression
  • Lower risk of cancer like:
  • Head & Neck cancer
  • Breast cancer
  • Oral cancer
  • Prostate cancer
  • Colorectal cancer
  • Lower risk of type 2 diabetes
  • Prevent the occurrence of gout
  • Promote good skin texture
  • Reduce the chance of Alzheimer’s disease 
  • Reduce the risk of Parkinson’s disease
  • Reduce the risk of a stroke and heart disease
  • Reduce the chances of liver cirrhosis

Side Effects of Coffee

Will black coffee raise blood sugar? Is black coffee bad for high blood pressure? Well, caffeine is hazardous when taken for years.


Likewise, caffeine dosage over 400 mg daily is dangerous to health. You may want to reduce when you have side effects, such as:

  • Anxiety 
  • Digestive problems
  • Fast heartbeat
  • Fatigue
  • Frequent urination or urgency
  • Headache
  • High blood pressure
  • Irritability
  • Muscle tremors
  • Sleeplessness

Diabetes and Blood Glucose Levels

Diabetes affects how your body processes blood glucose. Either the pancreas does not produce sufficient insulin, or the body cannot use the insulin it makes.

Insulin is a hormone that controls blood sugar. Hyperglycaemia is the typical outcome of uncontrolled diabetes. Over time, diabetic macrovascular and microvascular complications can occur.

There are two types of chronic diabetes, Type 1 and Type 2. Another type of diabetes is gestational diabetes. This type occurs during pregnancy but disappears after birth. Besides, prediabetes is when the glucose levels are more than normal limits. Still, it is not as high as in diabetes.

Best Drink for Diabetics

Which is better green tea or black coffee? A study shows that daily intake of green tea may lessen your risk of type 2 diabetes. Yet, more research must prove this point.

In general, water is the best choice for people with and without diabetes. This is because it won’t boost your blood sugar levels. Contrarily, dehydration can occur due to blood sugar that won’t go down. Drinking adequate water can help remove extra glucose through urine.

Black Coffee’s Effect on Glucose and Insulin

Did you know that genetics can affect caffeine metabolism? In return, that is how it simulates blood sugar. Moreover, people with slow metabolism show higher blood sugar levels than the rest.

Drinking caffeinated drinks for ages can also change their action on insulin sensitivity. Tolerance from durable intake may induce a protective effect.


How many black coffees a day is healthy? Less than 4 cups per day (<400mg caffeine) deliver benefits among healthy people. In opposition, very high dosages may result in side effects that interrupt daily life.

Is black coffee good for you? There is no definite answer to this question. Still, take a limited amount of coffee when you are:

  • Diabetic
  • Breastfeeding
  • Pregnant
  • Taking prescription drugs, such as birth control pills
  • Children


Question: Can type 2 diabetes be reversed permanently?

Answer: Up till today, there’s no cure for type 2 diabetes. Diabetes is a persistent disease. Yet, there are measures to prevent complications and manage a healthy sugar level.

Diet modification, weight loss, and exercise can help you keep a normal blood glucose. Besides, take your medications on time. Also, avoid using illegal drugs and supplements, which are harmful.

Question: Does coffee affect metformin?

Answer: Metformin is a medication that treats type 2 diabetes. Metformin can slow down the speed at which the body breaks down caffeine. Thus, you cannot take metformin with meals

Consuming it along with coffee might worsen the side effects of caffeine. As a result, doctors will have to adjust the dose of your medicine. With that, watch your blood sugar hard and near. 

Question: How do you bring your blood sugar down quickly?

Answer: Taking rapid-acting insulin is the fastest way to reduce your blood sugar. In fact, one unit of insulin can cause 30 to 50 mg per dL of blood sugar drop.

Yet, smoking, obesity, and low physical activity can delay the insulin absorption rate. Otherwise, you can try exercising, healthy eating, and staying hydrated. In cases of an emergency, visit a medical practitioner immediately. 


Caffeine affects everyone in various ways. But if you already drink coffee without additives, it causes no harm. Coffee is a drink that relishes everyone around the world.

Is black coffee good for diabetics? Or let’s rephrase this! Is black coffee that is without sugar good for diabetics? No food offers total benefit or protection against diabetes.

Besides, you can control diabetes with excellent care and education. 

Along with this, talk with your doctor about different diet options and the effects of drinking coffee.

With this, let’s hope you got your answer!

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