Green tea extract
One of the most common ingredients in weight supplements sold in Australia, and one of the most oversold. Here is the balanced version.
Written by the PureBurner Australia customer team · How we write and check thisLast reviewed September 2026
- Free tracked AU shipping
- 60-day money-back guarantee
- Dispatched from Australia
- One-off purchase — no subscription
The short version
- Green tea extract is a concentrated leaf extract standardised for catechins such as EGCG — not the same thing as a cup of tea.
- Evidence for effects on energy expenditure is small and often confounded by the caffeine that comes with it.
- Take it with food, stay within the label serve, and never stack multiple products containing it.
- Avoid it entirely if you have a liver condition, are pregnant or breastfeeding, or are under 18.
What it is
A concentrated preparation from the leaves of Camellia sinensis, standardised for polyphenols called catechins. The most discussed is EGCG. Extracts also usually contain caffeine, sometimes a substantial amount, though decaffeinated versions exist.
How it differs from a cup of tea
Concentration, and it matters more than people assume. A capsule can deliver catechin amounts you would need many cups of brewed tea to reach. Drinking green tea and taking a concentrated extract are not the same activity, and the safety guidance differs accordingly.
What the evidence supports
- Catechins are antioxidant compounds — that part is well established.
- Studies on energy expenditure show effects that are small, often measured over hours in controlled conditions, and frequently confounded by the caffeine content.
- Nothing supports treating it as a weight-loss treatment, and it cannot be advertised as one in Australia.
Safety guidance worth following
- There have been rare reports internationally of liver injury associated with concentrated green tea extract. Regulators in several countries advise taking it with food rather than on an empty stomach.
- Stop and seek medical advice if you notice yellowing of the skin or eyes, dark urine, persistent nausea or unusual abdominal pain.
- Do not exceed the dose on the label, and do not stack multiple products containing it.
- Count its caffeine towards your daily total.
Who should avoid it
- Anyone with a liver condition, or taking medication affecting the liver.
- Anyone pregnant or breastfeeding.
- Anyone under 18.
- Anyone on blood thinners or medication for blood pressure, without medical advice.
How to read a label
Look for the extract amount per serve, the standardised catechin or EGCG percentage, and the caffeine content. If a product lists green tea extract inside a "proprietary blend" with no amounts, you cannot assess either its usefulness or its safety — and that is reason enough to choose something else.
| What the label says | What it tells you | What to do |
|---|---|---|
| Extract mg per serve | The actual amount you are taking | Compare against the label's own daily maximum |
| Standardised to x% catechins/EGCG | How concentrated the active fraction is | Higher is not automatically better — it raises the caution too |
| Caffeine content | How it fits your daily caffeine intake | Add it to your coffee and tea total |
| "Proprietary blend" | Nothing useful — amounts are hidden | Treat as unassessable and choose a transparent label |
What this guide will not tell you
It will not tell you a dose that is right for you, whether green tea extract is safe alongside your medication, or that any product containing it will change your weight. Those are questions for a health professional and for your own tracked results over months, not for a page written by a seller.
If you are comparing products
PureBurner bundles and pricing
1 Bottle
30-day supply
$79
$79 per bottle
3 Bottles
90-day supply
$177
$59 per bottle
6 Bottles
180-day supply
$294
$49 per bottle
All prices in AUD. Free tracked shipping across Australia, 60-day money-back guarantee, and no subscription on any bundle.
Choose a bundleBefore you start any supplement
Frequently asked
Is green tea extract the same as drinking green tea?
No. An extract is concentrated, so a single capsule can contain the catechin load of many brewed cups. The safety guidance for extracts is stricter than for tea as a drink.
Does green tea extract burn fat?
It cannot be sold or described that way in Australia. Research on energy expenditure shows small effects, often measured over hours in controlled settings and frequently confounded by caffeine. Treat it as a minor supporting ingredient, not a fat-loss treatment.
How much EGCG is too much?
There is no single safe number that applies to everyone, which is why the sensible approach is to stay within the label serve, take it with food, avoid stacking several products containing it, and stop if you notice symptoms suggesting a liver problem.
Should I take it on an empty stomach?
No. Regulators in several countries advise taking concentrated green tea extract with food rather than fasted.
Does it contain caffeine?
Most extracts do, sometimes a meaningful amount. Count it towards your daily caffeine total, especially if you also drink coffee or energy drinks.