Slim coffee vs green tea: which suits your morning?
Both are everyday drinks with a long history in weight-support routines. They differ most in caffeine, taste and how easily they fit the day you already have.
Written by the Slim Coffee Booster Australia team · Last updated 13 September 2026
Key takeaways
- Green tea is gentler on caffeine — roughly 25-40 mg a cup against 70-100 mg for a single-shot coffee.
- Green tea extract is a common ingredient in slimming coffee blends, so this is not really an either/or.
- Coffee wins on habit: most Australians already make one every morning, and habits that already exist are the ones that last.
- Green tea wins if caffeine keeps you awake, makes you anxious, or you simply prefer the taste.
Caffeine compared
The clearest difference between the two is caffeine. A cup of green tea usually lands somewhere between 25 and 40 mg. A single-shot flat white is closer to 70-100 mg, and a double shot can pass 180 mg. Matcha sits in between, because you drink the whole leaf rather than an infusion.
Green tea also contains L-theanine, an amino acid many people find takes the edge off caffeine, which is why a strong green tea tends to feel steadier than an equally caffeinated coffee. If jitters are your problem, that matters more than the milligram count.
What each is traditionally used for
Coffee
Caffeine is one of the few widely studied ingredients associated with short-term metabolic rate and with perceived effort during exercise — in plain terms, a session can feel easier. Black coffee itself carries almost no kilojoules; nearly all the energy in a cafe coffee comes from the milk and sugar.
Green tea
Green tea is traditionally used for its catechins, the best known being EGCG, and it has been part of weight-support blends for decades. As a drink, its practical strength is that it is warm, satisfying, nearly kilojoule-free and easy to have in the afternoon without wrecking your sleep.
Neither is a weight-loss treatment
Side-by-side
| Slim coffee sachet + coffee | Green tea | Matcha | |
|---|---|---|---|
| Caffeine per cup | 70-100 mg from the coffee | 25-40 mg | 40-70 mg |
| Kilojoules (no milk or sugar) | Very low | Negligible | Negligible |
| Added soluble fibre | Yes | No | No |
| Afternoon friendly | Usually not | Yes | Usually |
| Effort to prepare | None extra — one stir | Boil, steep, wait | Whisk and sift |
| Typical cost per serve | $1.50-$2.50 | $0.20-$0.60 | $1.00-$2.50 |
Cost per day
Plain green tea bags are the cheapest option on this page by a wide margin, and if cost is the deciding factor, that is your answer. Good loose-leaf and ceremonial matcha close the gap quickly.
A Slim Coffee Booster sachet is $2.50 a day on a single box and $1.50 a day on the three-box bundle, on top of coffee you were buying anyway. What you are paying for is the added extracts and soluble fibre in a format that needs no extra step — see the full price breakdown.
Which one fits your routine
- You already make coffee every morning: the sachet adds nothing to your routine except a stir. This is the lowest-friction option there is.
- Caffeine keeps you up or makes you anxious: green tea, and keep the slimming coffee out of it entirely.
- You want something for the afternoon: green tea. A slimming coffee is a morning product.
- You want added fibre: the sachet. Green tea contributes none.
- You are on the tightest budget: black coffee and green tea, both unsweetened, will always be the cheapest sensible answer.
You can use both
This is not a competition. Slim Coffee Booster already contains green tea extract alongside green coffee bean extract, L-Carnitine, resistant dextrin, psyllium husk, white kidney bean extract and mulberry leaf extract. A sensible day might be the sachet in your morning coffee and a green tea in the afternoon, when you want something warm without the caffeine hit.
Just keep the total caffeine in view. See is slimming coffee safe for the numbers.
Questions people also ask
Is green tea better than coffee for weight loss?
Can I put a Slim Coffee Booster sachet in green tea?
How much green tea a day is reasonable?
Does matcha have more caffeine than green tea?
Which is better if I am caffeine sensitive?
Keep reading
Slim Coffee Booster is a food supplement. It is not intended to diagnose, treat, cure or prevent any disease, and works best alongside balanced meals and regular movement. Always read the label and follow the directions for use.