Ingredient profile
Green Tea Extract in Slim Metrix: Dose, Evidence and Liver Safety
Green tea extract is second in the 276 mg Slim Metrix blend, so one capsule holds at most 138 mg, with up to about 69 mg EGCG. Reviews found about 1 kg more weight loss than placebo, and none in studies outside Japan (NIH ODS, Weight-loss supplements). Extract pills are a rare but known cause of liver injury (LiverTox, Green tea).
Written by the Slim Metrix editorial teamUpdated
The basics
What is the green tea extract in Slim Metrix?
It is a concentrate made from the leaves of Camellia sinensis, the plant behind green and black tea. The label lists it second in the blend.
The label line reads "Green Tea (Camellia sinensis) Leaf 98% Polyphenols 80% Catechins 50% EGCG." Those three numbers describe the strength of the powder, not the dose. Catechins are a group of polyphenols, and EGCG is the main catechin. So the same powder is 98% polyphenols, 80% catechins and 50% EGCG.
| Label name | Green Tea (Camellia sinensis) Leaf 98% Polyphenols 80% Catechins 50% EGCG |
|---|---|
| What it is | Camellia sinensis leaf extract, standardized to catechins and EGCG |
| Type | Leaf extract (contains caffeine) |
| Position on the label | 2 of 8 in the blend |
| Amount per serving | Not printed (at most 138 mg extract, about 69 mg EGCG) |
| What research shows | About 1 kg more loss than placebo overall, none in non-Japanese studies; extract pills are a rare cause of liver injury |
| Strength of evidence | Tiny effect; liver flag |
| Why it is in the formula (brand view) | The usual base of "thermogenic" formulas |
| Main caution | Stop and call a doctor for dark urine, yellow skin or eyes, or belly pain. It can lower nadolol and atorvastatin levels. |
Blend math
How much green tea extract and EGCG are in one capsule?
At most 138 mg of extract, which means at most about 69 mg of EGCG. The label prints no single amounts. Blend ingredients must be listed heaviest first (FDA, Labeling guide ch. IV), and green tea is second of eight, so it can weigh no more than half of 276 mg.
| What | Share of the powder | Most per capsule |
|---|---|---|
| Green tea extract | 100% | 138 mg |
| Polyphenols | 98% | About 135 mg |
| Catechins | 80% | About 110 mg |
| EGCG | 50% | About 69 mg |
| Caffeine | Not published | Not published |
Weight
Does green tea extract help you lose weight?
Barely, if at all. A 2012 Cochrane review of 14 trials found about 0.95 kg more weight loss than placebo. In the six studies done outside Japan, there was no significant difference (NIH ODS, Weight-loss supplements).
Catechins alone had no effect on body weight. Catechins plus caffeine gave about 1.38 kg more loss than caffeine alone (NIH ODS, Weight-loss supplements). NCCIH calls the effect modest at best, depending on the product and how active the person is (NCCIH, Green tea). It also says no studied supplement, green tea extracts included, has been shown to work for weight loss (NCCIH, Weight control).
The small benefit seen in trials came mostly when catechins and caffeine were paired. Slim Metrix lists no caffeine as an ingredient and prints no caffeine amount.
Caffeine
Does the green tea in Slim Metrix contain caffeine?
Probably some, but the amount is not printed. Green tea naturally contains caffeine (NCCIH, Green tea), and the label gives no caffeine line.
The sales page calls the product "thermogenic" (Slim Metrix sales page). That word usually points to caffeine and capsaicin. With no caffeine amount listed, and cayenne sixth of eight, the label does not back up a strong warming effect. Pregnant people should ask about caffeine from any source (NCCIH, Green tea). If you are sensitive to it, take the capsule in the morning, as the label suggests.
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Order nowLiver safety
Is green tea extract bad for your liver?
For most people, no, but it is a known if rare risk. LiverTox gives green tea its top likelihood score, A, as a cause of liver injury. More than 100 cases are reported, against very wide use (LiverTox, Green tea).
Most cases involve extract in supplements, especially multi-ingredient weight-loss products. Injury usually starts 1 to 6 months after starting. Most people recover after stopping, but liver failure and deaths have occurred (LiverTox, Green tea). People with a certain immune gene variant, 5 to 15 percent of Americans, appear more likely to be affected (NCCIH, Green tea).
Injured patients took roughly 800 mg to 1.86 g of extract a day. No safe threshold is known (LiverTox, Green tea). In a 12-month trial, 1,315 mg of catechins a day raised liver enzymes (NIH ODS, Weight-loss supplements). One Slim Metrix capsule is well below those amounts, but lower is not the same as proven safe.
Dark urine, yellow skin or eyes, or belly pain while taking any product with green tea extract needs medical care. Do not restart it before a doctor says so; injury often returns faster (LiverTox, Green tea).
The full liver story is in the green tea extract and liver safety article.
Medicines
Which medicines interact with green tea extract?
Three are named by NCCIH. Green tea can lower blood levels of two heart medicines and interacted with one bone medicine in a study (NCCIH, Green tea).
Nadolol
A beta-blocker. Green tea can lower its blood levels.
Atorvastatin
A statin. Green tea can lower its blood levels too.
Raloxifene
An interaction was seen in one study.
Other extract side effects include nausea, constipation, stomach discomfort and higher blood pressure (NCCIH, Green tea). If you take any of these medicines, ask your pharmacist before starting. All cautions for the full capsule are on the side effects page.
Use it more safely
How can you lower the risk from green tea extract?
Take it with food
NIH advises taking green tea extracts with food (NIH ODS, Weight-loss supplements). Breakfast fits the label's morning timing.
Do not stack extracts
Check other products for green tea, EGCG or "catechins." Several together add up fast.
Watch months 1 to 6
Most liver cases began in this window. Any warning sign means stop and call.
Bottom line
Is green tea extract a good reason to buy Slim Metrix?
Not on its own. The amount is clearly described and modest, and the weight effect even at full doses is about a kilogram at best. Compare it with the berberine profile, or see all ten on the ingredients overview.
FAQ
Green tea extract in Slim Metrix: common questions
How much EGCG is in Slim Metrix?
The label does not say. Green tea extract is second in a 276 mg blend, so it can weigh at most 138 mg. At 50% EGCG, that is at most about 69 mg per capsule. The real amount is probably lower.
Is green tea extract safe to take every day?
For most healthy adults at small amounts, the risk looks low, but it is not zero. Extract pills are a rare, well-documented cause of liver injury, usually within 1 to 6 months. Take it with food and stop at any liver warning sign.
What are the signs of liver damage from green tea extract?
Dark urine, yellow skin or eyes, and belly pain are the signs to act on. Stop the product and see a doctor promptly. Do not restart it unless a doctor says so, because injury often comes back faster.
How much caffeine is in green tea extract capsules?
It depends on the product. Green tea naturally contains caffeine, but Slim Metrix prints no caffeine amount and does not list caffeine as an ingredient. If you are sensitive, take the capsule in the morning and watch your other caffeine sources.
Does green tea extract burn belly fat?
No good evidence shows that. Reviews found about 1 kg more weight loss than placebo overall, with no difference in studies outside Japan, and no specific effect on belly fat is reported in our sources.
Can I take green tea extract with blood pressure medicine?
Ask your doctor first. Green tea can lower blood levels of nadolol, a beta-blocker, and extracts can raise blood pressure in some people. Bring the Slim Metrix label to your pharmacist.
Who wrote this
Written and reviewed by
Plain-language pages built from the label, the sales page and linked public health sources.
Last updated . See our editorial standards and how we check reviews. This website is run by Slimmetrixfit, a licensed U.S. retail desk for Slim Metrix, not by the manufacturer. Orders are processed by BuyGoods on the brand's sales page. Buying through our order links earns us a commission.
Keep reading
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Ingredient-by-ingredient side effects, medicine interactions, the green tea liver signs and when to stop and call a doctor.
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Green tea extract and the liver
Why green tea extract pills carry a liver warning, who is more at risk, and the symptoms that mean stop now.
Read moreBerberine
Berberine sits fourth in the blend: at most about 69 mg, against studied doses of 300 to 1,500 mg a day.
Read moreLicensed U.S. retail desk for Slim Metrix
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