Ingredient profile
Green Tea Extract in Slim Metrix: Weight Research and Liver Safety
Slim Metrix lists green tea leaf extract second in its 276 mg blend, standardized to 98% polyphenols, 80% catechins and 50% EGCG. The amount is not published. In reviews, green tea gave a small weight effect that may not matter in daily life. Green tea extract is also a rare but well-documented cause of liver injury.
Written by the Slim Metrix editorial teamUpdated
Label facts
How much green tea extract is in Slim Metrix?
The label does not give a number. Green tea extract is the second of eight ingredients in a 276 mg proprietary blend, and the blend shows only its total weight (Slim Metrix label graphic).
Blend ingredients must be listed from most to least by weight (FDA: labeling guide (proprietary blends)). So green tea is probably one of the larger shares, but no one outside the maker can say how large. If all eight were split equally, each would be about 34.5 mg; the real split is not published.
| Name on the label | Green tea (Camellia sinensis) leaf, 98% polyphenols, 80% catechins, 50% EGCG |
|---|---|
| What it is | Camellia sinensis leaf |
| Form | Herbal extract (catechins, EGCG) |
| Amount per capsule | Part of the 276 mg blend (not disclosed) |
| What research used | Weight reviews: small, often not significant |
| Strength of evidence | Small, unlikely to matter clinically |
| Why it is sold | Sold for metabolism |
| Main caution | Extracts are a rare but well-documented cause of liver injury; EFSA saw liver-enzyme rises at 800 mg EGCG a day or more. |
Read the panel
What do 98% polyphenols, 80% catechins and 50% EGCG mean?
They describe how concentrated the extract is. Half of the extract's weight is EGCG, the best-known catechin in green tea.
The numbers nest inside each other. Polyphenols are a large family of plant compounds, catechins are one group in it, and EGCG is one catechin (Slim Metrix label graphic).
A strong extract is not the same as a large dose. These figures describe the extract, not how many milligrams of it sit in each capsule. Every line is explained on the Supplement Facts page.
| Plant | Camellia sinensis leaf |
|---|---|
| Standardized to | 98% polyphenols, 80% catechins, 50% EGCG |
| Place in the blend | Second of eight, after alpha lipoic acid |
| Caffeine | Not published |
| Amount per capsule | Not published |
The research
Does green tea extract help you lose weight?
Only a little, if at all. The largest review found a small, non-significant loss, close to zero outside Japan.
| Source | Finding |
|---|---|
| Cochrane review, 1,945 people | Small, non-significant loss; outside Japan about 0.04 kg (under 2 ounces) (Cochrane review: green tea and weight) |
| NIH Office of Dietary Supplements | About 0.95 kg (about 2 pounds) more than placebo, of debatable clinical relevance (NIH ODS: weight-loss supplements (health professional fact sheet)) |
| NCCIH | Catechins and caffeine may have a modest effect on weight (NCCIH: green tea) |
NCCIH adds that supplements studied for weight loss, green tea extracts among them, have not been shown to work (NCCIH: weight control). None of these studies tested Slim Metrix. Our weight-loss guide covers what does move the scale.
Liver safety
Can green tea extract hurt your liver?
Rarely, yes. LiverTox rates green tea as a well-established cause of liver injury, its highest likelihood score (A), with more than 100 cases tied to the extract (LiverTox: green tea).
Brewed tea and extracts are not the same. NCCIH says liver injury has been reported mainly with extracts (NCCIH: green tea). Timing matters too:
Before the first capsule
Tell your doctor about any past liver trouble. Bring the label.
Months 1 to 6
This is when injury from green tea extract usually appears (LiverTox: green tea).
If you feel unwell
Stop the capsules and call your doctor. Name every supplement you take.
If you have had liver problems, do not start Slim Metrix without your doctor's okay. Read more in our article on green tea extract and the liver.
Dose check
How does the EGCG in one capsule compare with the level linked to liver changes?
It stays well below it. Even if the whole 276 mg blend were green tea extract, one capsule would hold under 138 mg of EGCG, under 18% of the level where EFSA saw liver changes.
The European Food Safety Authority found that 800 mg or more of EGCG a day as a supplement raised liver enzymes compared with control (EFSA: safety of green tea catechins). EFSA did not name any supplemental dose as safe, so a lower amount is not a guarantee.
- Take one capsule a day, never more.
- Count any other product that lists green tea extract.
Quick check
Should you ask a doctor before taking Slim Metrix?
Yes, if you take any medicine or have had liver trouble. Seven yes-or-no questions sort out the rest.
A checklist, not medical advice. All interactions are listed on the side effects page.
The rest of the formula
What else is in Slim Metrix besides green tea?
Nine more ingredients on six more pages. There is no cinnamon among them.
FAQ
Green tea extract in Slim Metrix: common questions
Is there caffeine in the green tea extract in Slim Metrix?
The label does not say. It lists a green tea leaf extract standardized to polyphenols, catechins and EGCG, with no caffeine line (Slim Metrix label graphic). Green tea naturally contains caffeine, but extracts vary. If caffeine bothers you, ask the order desk at +1 (855) 482-1597 and check with your pharmacist before you start.
Can Slim Metrix cause liver damage?
It is possible but rare. Slim Metrix contains green tea extract, which LiverTox calls a well-established cause of liver injury, with more than 100 reported cases (LiverTox: green tea). If you have had liver problems, ask your doctor first. If you feel unwell while taking it, stop and get checked.
How much EGCG is in Slim Metrix?
The exact amount is not published. EGCG makes up half of the green tea extract, and the extract shares a 276 mg blend with seven other ingredients (Slim Metrix label graphic). So one capsule holds under 138 mg of EGCG, far below the 800 mg a day where EFSA saw liver-enzyme rises (EFSA: safety of green tea catechins).
Is the green tea in Slim Metrix matcha?
The label does not say so. It lists a Camellia sinensis leaf extract, standardized to 50% EGCG (Slim Metrix label graphic). A brand photo shows matcha powder, but that picture is decoration, and its file name mentions cinnamon, which is not an ingredient either. Go by the label, not the photo.
How soon can green tea extract affect the liver?
Usually within 1 to 6 months of starting, according to LiverTox, which has more than 100 such cases on record (LiverTox: green tea). Injury is rare, but watch those first months closely. Keep any blood tests your doctor orders, and stop the capsules and call your doctor if you feel unwell.
Can I take Slim Metrix if I take nadolol?
Ask your doctor or pharmacist first. NCCIH says high doses of green tea can lower blood levels of nadolol, a heart and blood pressure drug (NCCIH: green tea). The amount of green tea in Slim Metrix is not published, so nobody can say how large the effect would be.
Does green tea extract speed up metabolism?
Not by much, based on the evidence. The sales page uses phrases like "Metabolic Boost", but reviews found green tea's effect on weight small and often not significant (Cochrane review: green tea and weight) (NIH ODS: weight-loss supplements (health professional fact sheet)). A reduced-calorie eating plan and more activity matter far more (NIDDK: choosing a safe weight-loss program).
Who wrote this
Written and reviewed by
Plain-language pages built from the brand's label graphic, the sales page and linked medical sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by a U.S. stocking partner for Slim Metrix, not by the manufacturer. We earn money when you buy through our order links.
Keep reading
More about Slim Metrix
Green tea extract and the liver
What LiverTox and EFSA say about green tea extract and the liver, and how much EGCG one Slim Metrix capsule could hold.
Read more
Side effects
Side effects of all ten Slim Metrix ingredients, the medicines to ask about, and who should not take it.
Read moreSupplement Facts
Every line of the Slim Metrix label typed out, with the chromium DV fix and what the label leaves out.
Read moreU.S. stocking partner for Slim Metrix
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