Many of us start the day with a cup of our favourite coffee. But the question of whether coffee is healthy still stirs up plenty of emotion and controversy. The facts and myths about how coffee affects the body can be confusing. In this article we untangle some of that confusion and look at the benefits and possible side effects of drinking coffee.
The positive effects of coffee on health: how does coffee affect your health?
Alertness and concentration
Coffee is well known for its stimulant properties, thanks to caffeine. After you drink coffee, caffeine blocks the adenosine receptors responsible for the feeling of tiredness, which improves focus and mental performance. Drinking coffee regularly may also improve memory and support wellbeing by stimulating dopamine production.
Interestingly, research suggests caffeine may support the brain’s neuroplasticity, meaning neurons’ ability to form new connections, which is key to learning. That’s one reason coffee is popular among students and people in intellectually demanding jobs.
Coffee and disease prevention
Scientific studies suggest that drinking coffee regularly may lower the risk of certain conditions:
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Type 2 diabetes: the caffeine in coffee helps support blood glucose regulation. Other compounds in coffee, such as polyphenols, may also support sugar metabolism.
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Alzheimer’s and Parkinson’s disease: coffee lowers the risk of developing these neurodegenerative conditions. Antioxidants in coffee protect nerve cells from damage.
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Liver cirrhosis and liver cancer: numerous studies point to a protective effect of coffee on the liver. Drinking coffee may lower the risk of these conditions by as much as 40%.
Coffee as a source of antioxidants
Coffee contains a range of antioxidants, such as chlorogenic acid, which protect cells from oxidative stress. This has a particularly beneficial effect on the cardiovascular system and lowers the risk of heart disease. What’s more, antioxidants help neutralise free radicals, which can contribute to ageing and the development of chronic disease.
Coffee is also a source of magnesium and potassium, which support healthy muscle and nervous system function. It’s worth remembering that some types of coffee, such as green coffee, contain even more antioxidants than roasted coffee.
Does coffee have side effects?
Rising blood pressure and the cardiovascular system
Drinking too much coffee can lead to a rise in blood pressure, though the effect is usually short-lived. People with high blood pressure are advised to drink coffee in moderation, based on their own tolerance. It’s worth noting that regularly drinking coffee can lead the body to adapt, which reduces its effect on blood pressure over time.
Does coffee deplete magnesium?
This is a popular myth. In fact, coffee provides some magnesium, and moderate coffee consumption doesn’t have a negative effect on magnesium levels in the body. That said, it’s worth eating a varied diet to get enough of this mineral from other sources too.
Sleep disruption and overstimulation
Drinking a lot of coffee, especially in the evening, can lead to insomnia and raised stress levels. It’s recommended to limit coffee to 2-3 cups a day. For anyone particularly sensitive to caffeine, decaf coffee can be a good option, since it keeps the flavour but is gentler on the body.
Coffee in your daily diet: drinking coffee every day
Moderate coffee consumption
Moderate coffee consumption, around 3-4 cups a day, can be part of a healthy diet. That said, it’s important to avoid adding large amounts of sugar and cream, which can cancel out the health benefits. It’s also worth paying attention to the quality of the beans and how the coffee is brewed, to get the most out of its beneficial properties.
Does coffee dehydrate you?
Studies have shown that coffee doesn’t dehydrate you. Although it has a mild diuretic effect, it doesn’t lead to dehydration when drunk in moderate amounts. Coffee can count towards your daily fluid intake, just like tea or juice.
Does coffee irritate your stomach?
Coffee can irritate the stomach, especially in people with a sensitive digestive system. Choosing lower-acidity coffees, adding milk and avoiding coffee on an empty stomach can help you enjoy the flavour without the discomfort.
Read the full article:
Does coffee irritate your stomach? We also answer which coffee is gentle on the stomach.
Coffee and healthy habits
Coffee can be a great addition to a healthy lifestyle. Combined with regular physical activity, it can support metabolic processes and improve overall wellbeing. That said, remember that too much caffeine can have a negative effect on your health, so moderation is key.
Coffee and pregnancy: is coffee healthy for pregnant women?
Pregnant women can drink coffee, but should limit their intake to a maximum of 200 mg of caffeine a day, or around two cups. Decaf coffee can be an alternative, keeping the flavour while being gentler on the body, as long as you choose coffee decaffeinated with water rather than chemical solvents. It’s worth checking with your doctor to make sure drinking coffee is safe in your particular case.
How much caffeine can you have per day?
Few people realise that caffeine occurs naturally in more than 65 different plants. Besides coffee, you’ll find it in tea, guarana, kola nuts and cocoa beans. It’s also commonly added to energy drinks and sweets. The fact that caffeine turns up in products we don’t usually associate with it raises the risk of accidentally overdoing it.
How much coffee can you safely drink?
According to experts, a healthy caffeine intake for an adult is 300-400 mg a day, roughly equivalent to three cups of coffee (espresso). Keep in mind that caffeine’s effects vary depending on individual sensitivity. Too much can lead to symptoms such as overstimulation and a racing heart, and in extreme cases to caffeine toxicity, with symptoms like vomiting, convulsions or insomnia. To get the most out of caffeine’s benefits, it’s worth keeping your intake moderate.
The effect of coffee on your health: summary
Coffee drunk in moderate amounts has a positive effect on health. It may help improve concentration, protect the liver and lower the risk of neurodegenerative disease. It’s important, though, to drink it in moderation, adjusting your intake to your own tolerance. That way, coffee can be not just tasty but a healthy part of your daily diet.
If you want to get the most out of your coffee, it’s worth choosing high-quality beans, ideally from certified sources. Balanced coffee consumption, combined with an active lifestyle and a healthy diet, can be key to feeling good and staying healthy in the long run.
