For many of us, the day doesn't start without a tumbler of filter coffee. But is that daily habit good for you? The answer, for most healthy adults, is encouraging, with a few things worth knowing.
Here's what research actually says about coffee, chicory and milk, what it doesn't say, and how to make your filter coffee a healthier habit.
For most healthy adults, drinking a moderate amount of coffee, around 3–4 cups a day, is linked with health benefits rather than harm. The biggest health factors in filter coffee are usually how much sugar you add and how many cups you drink.
What the research says about coffee
The best overview comes from a large umbrella review published in The BMJ in 2017, which brought together more than 200 earlier analyses of coffee and health. It found that coffee drinking was "more often associated with benefit than harm", with the largest benefits at about three to four cups a day compared with none.
Moderate coffee drinking was linked with:
- a lower risk of dying from any cause
- a lower risk of heart disease
- a lower risk of some liver conditions
- a lower risk of type 2 diabetes
- a lower risk of some cancers
An important caveat: most of this research is observational. It shows that coffee drinkers tend to have these lower risks, not that coffee directly causes them. People who drink coffee may also differ in other ways.
What's in a cup of filter coffee?
Coffee
Coffee contains caffeine and natural plant compounds called polyphenols, especially chlorogenic acids, which act as antioxidants. Researchers think these compounds may explain some of coffee's health links.
Caffeine also works on the brain by blocking adenosine, a chemical that builds up and makes you feel sleepy. That's why coffee helps you feel more awake and focused.
Chicory
Most South Indian filter coffee contains roasted chicory. Two useful facts:
- Chicory has no caffeine. So a blend with more chicory gives you a milder cup with less caffeine (see what each coffee-chicory ratio tastes like). A 50:50 blend has roughly half the coffee of a pure coffee powder.
- Chicory root contains inulin, a fibre that feeds good gut bacteria. But roasting breaks some of it down, and a cup of coffee contains only a small amount of chicory, so don't expect a big gut-health boost from your morning kaapi.
Milk
Filter coffee is usually made with plenty of milk, which adds protein and calcium.
There's also early lab research on milk and coffee. In 2023, researchers at the University of Copenhagen found that when polyphenols, like those in coffee, combine with proteins, like those in milk, their anti-inflammatory effect in immune cells in the lab was stronger. It's an interesting finding, but it was a cell study, not a study in people. We don't yet know whether coffee with milk reduces inflammation in the body.
Health benefits of coffee, explained simply
- It helps you stay alert. Caffeine reduces tiredness and can improve focus and reaction time.
- It's rich in antioxidants. Coffee is one of the biggest sources of polyphenols in many people's diets.
- It's linked with better liver health. Coffee drinkers have a lower risk of several liver conditions in observational studies.
- It's linked with a lower risk of type 2 diabetes in observational studies.
- It's linked with a longer life. Moderate coffee drinkers had a lower risk of death from any cause in the BMJ review.
These are associations from research on coffee in general, not proven effects of filter coffee in particular.
Things to watch
Sugar
A tumbler of filter coffee with two teaspoons of sugar, drunk three or four times a day, adds up quickly. Sugar is often the least healthy part of your coffee. Try cutting down gradually; most people adjust within a couple of weeks.
Caffeine
Too much caffeine can cause trouble sleeping, a racing heart, anxiety or an upset stomach. The European Food Safety Authority (EFSA) considers up to 400 mg of caffeine a day safe for most healthy adults, and up to 200 mg a day during pregnancy. How much caffeine is in your tumbler depends on the powder, how much you use and the chicory ratio.
To cut down on caffeine, choose a blend with more chicory, or have your last cup earlier in the day.
Cholesterol
Coffee contains natural oils called cafestol and kahweol, which can raise LDL ("bad") cholesterol. Paper filters trap most of these oils, but metal filters, including the South Indian filter and the French press, let more of them through. If you have high cholesterol, keep your intake moderate and talk to your doctor.
Who should drink less coffee
- Pregnant women: the BMJ review found higher coffee intake in pregnancy was linked with low birth weight and pregnancy loss. Follow your doctor's advice.
- Women at higher risk of fractures: the same review found a link between coffee and fracture risk in women.
- People with anxiety, sleep problems, acid reflux, or heart rhythm problems, and anyone told by their doctor to limit caffeine.
How to make your filter coffee healthier
- Cut the sugar gradually, or switch to a little jaggery if you prefer, in smaller amounts.
- Stick to 3–4 cups a day or fewer.
- Choose your ratio: a higher-chicory blend, like the Balanced Blend (50:50), gives a milder, lower-caffeine cup.
- Use toned milk if you're watching calories or fat.
- Have your last cup by mid-afternoon so it doesn't affect your sleep.
- Use fresh, good-quality powder. It tastes better with less sugar.
The eco side of filter coffee
A South Indian coffee filter is reusable for years, and used coffee grounds can go into your compost or garden. Compared with single-use pods, sachets or paper filters, it's one of the lowest-waste ways to make coffee.
Frequently asked questions
Is South Indian filter coffee healthy?
For most healthy adults, yes, in moderation. Research links 3–4 cups of coffee a day with health benefits. The main things to watch are sugar, total caffeine, and cholesterol if yours is high.
Is chicory in filter coffee bad for health?
No. Chicory is a roasted root with no caffeine. It makes the coffee milder and is safe for most people.
How many cups of filter coffee can I drink in a day?
For most healthy adults, 3–4 cups a day is considered moderate. If you're pregnant or have a health condition, check with your doctor.
Does filter coffee raise cholesterol?
It can, a little. Metal filters let through coffee oils (cafestol and kahweol) that can raise LDL cholesterol. If your cholesterol is high, drink moderately and ask your doctor.
This article is for general information only and isn't medical advice. If you have a health condition, are pregnant, or take medication, talk to your doctor about how much coffee is right for you.
Sources: Poole R et al., "Coffee consumption and health: umbrella review of meta-analyses of multiple health outcomes", BMJ 2017; University of Copenhagen, "Coffee with milk may have an anti-inflammatory effect", 2023; European Food Safety Authority, Scientific Opinion on the safety of caffeine, 2015.
Enjoy your kaapi your way. Try the Classic Blend (80:20) for the traditional taste, or the Balanced Blend (50:50) for a milder, lower-caffeine cup.
