Is Coffee Good for Weight Management? What the Research Says
Coffee can fit well into a weight management plan. Caffeine gives a small, short-term lift to energy use, and large studies link regular coffee drinking with slightly lower body weight measures. The effects are small, though, and what you add to your coffee often matters more than the coffee itself.
For many Australians, coffee is non-negotiable. The good news is that black coffee is very low in kilojoules and may even offer a little help. Here's what the research actually says, and how to make your daily cup work for your goals.
How caffeine affects metabolism
Caffeine is a mild stimulant. In the hours after you drink it, it can slightly increase the number of kilojoules your body burns and the amount of fat it uses for fuel. The effect is real but small, and it tends to be weaker in people who drink coffee every day because the body adapts.
Caffeine can also make exercise feel a bit easier, which may help you stay active, one of the most reliable ways to manage weight.
Does coffee reduce appetite?
Some people find a coffee takes the edge off hunger for a while, but research on appetite is mixed and any effect is short-lived. Coffee alone is not a reliable appetite suppressant.
What do large studies show?
A 2019 meta-analysis of 12 observational studies found that higher coffee intake was associated with a very slightly lower body mass index and waist size, with the link a little stronger in men. Because these studies are observational, they show an association, not cause and effect: coffee drinkers may differ in other ways, such as diet or activity.
The takeaway: coffee doesn't appear to cause weight gain on its own, and it may be modestly helpful, but it won't do the heavy lifting.
Milk, sugar and syrups: where kilojoules add up
| Coffee order | What to know |
|---|---|
| Long black or espresso | Almost no kilojoules |
| Flat white or latte (full-cream milk) | Milk adds most of the kilojoules; larger sizes add more |
| Skim, lite or unsweetened plant milk | Usually fewer kilojoules than full-cream |
| Added sugar or syrup | Each teaspoon or pump adds up quickly over a week |
| Iced coffee with cream or ice cream | Can be closer to a dessert than a drink |
How to make your coffee work for you
- Choose smaller sizes or lighter milk if you have several coffees a day.
- Cut back on sugar gradually so you barely notice the change.
- Keep caffeine in a comfortable range; see our guide on how much caffeine per day is safe.
- Avoid late-afternoon caffeine: poor sleep is linked with more cravings and snacking.
- Pair coffee with a protein- or fibre-rich breakfast to stay fuller for longer.
What about coffee add-ins?
Coffee add-ins are sachets you stir into your cup, often containing fibre such as psyllium, plus extracts like green tea or green coffee bean. Their strongest ingredient is usually the fibre, which may help with fullness. Read more in our guide to psyllium husk and appetite control.
If you're weighing one up, our Akemi Coffee Boost review covers the ingredients, caffeine per sachet, price in Australia, shipping and the 30-day guarantee, so you can decide whether it suits you.
Frequently asked questions
Does black coffee help you lose weight?
Black coffee is very low in kilojoules and caffeine can slightly increase energy use for a few hours. It can support weight management, but the effect is small.
Is it better to drink coffee before exercise?
Some people find a coffee 30 to 60 minutes before exercise makes the workout feel easier. Avoid it late in the day if it affects your sleep.
Does milk in coffee cause weight gain?
Milk adds kilojoules, especially in large or multiple coffees, but it also adds protein and calcium. Choosing a smaller size or lighter milk can help if you're watching your intake.
Are coffee add-ins worth it?
They can be a convenient way to add fibre to your day, but results are usually modest. Check the caffeine content, ingredients, price and refund policy before buying.
More reading
- How Much Caffeine Per Day Is Safe? A Guide for Australians
- Does Psyllium Husk Help With Appetite Control?
Medical disclaimer: This article is general information, not medical advice. Talk to your GP or another healthcare professional before changing your diet, caffeine intake or supplements, especially if you are pregnant, breastfeeding, under 18, taking medication or managing a health condition.