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What Are the Side Effects of Green Tea Extract?
Green tea extract side effects include constipation, nausea, higher blood pressure and, rarely, liver damage, according to the NIH. A SodaSlim capsule, which is a capsule and not a drink, prints 130 mg of the extract. Liver injury is uncommon but reported, mostly with extract pills. Dark urine, yellow skin or eyes and belly pain mean stop and call a doctor.
Written by the SodaSlim label deskUpdated · 4 min read
Which side effects can green tea extract cause?
Green tea extract can cause constipation, nausea and higher blood pressure, and the NIH also lists liver damage (NIH ODS, Weight loss supplements (consumers)).
Extract is not a cup of tea. Green tea as a drink is not linked to safety concerns in adults, while the liver reports center on extract pills (NCCIH, Green tea).
Caffeine is a second source of trouble. Green tea extract holds some, and caffeine can disturb sleep and cause headaches (MSK, Green tea (About Herbs)).
Can green tea extract hurt your liver?
Yes, in rare cases. NCCIH calls liver injury uncommon but reported, mainly with green tea extract pills (NCCIH, Green tea). A gene variant that appears to raise the risk is carried by 5 to 15 percent of Americans.
A review of 34 trials found liver events in 4, mostly mild enzyme rises and none serious. The authors call serious events rare but the evidence not conclusive (Isomura 2016, Liver safety of green tea extracts (RCT review)).
When should you stop green tea extract and see a doctor?
Stop and get care if you notice belly pain, dark urine, or yellow skin or eyes. Memorial Sloan Kettering relays this USP advice, and adds that anyone with a liver problem should not use the extract (MSK, Green tea (About Herbs)).
Keep taking any prescribed medicine, and ask your pharmacist before adding a supplement. Chest pain, fainting or a racing heart that will not settle need care now.
| Sign | Likely link | What to do |
|---|---|---|
| Nausea or constipation | Listed by the NIH | Stop the capsule and ask a pharmacist |
| Jitters, poor sleep, headache | Caffeine | Cut stimulants; ask a doctor if it persists |
| Belly pain or dark urine | Possible liver strain | Stop and call a doctor now |
| Yellow skin or eyes | Possible liver injury | Stop and seek care now |
SodaSlim: 30 capsules, 30-day bottle1 capsule a day · 2, 3 or 6 bottles · price and guarantee terms at checkout
See packsHow much green tea extract is in a SodaSlim capsule?
One SodaSlim capsule holds 130 mg of green tea extract, standardized to 98% polyphenols, 75% catechins and 45% EGCG. That works out to about 58.5 mg of EGCG and under 3.9 mg of caffeine from the extract itself.
The capsule also holds 138 mg of caffeine anhydrous, so stimulant effects may add up. Our side effects page covers the whole capsule.
130 mg · per capsule
- Printed
- 130 mg, 50% chlorogenic acids (about 65 mg)
- Not printed
- Its own caffeine; the extraction method
Three poor-quality trials
Read the profileAll five lines as a list
- Green coffee bean extract 130 mg: Three poor-quality trials
- Raspberry ketone 130 mg: Almost no human data
- Garcinia extract 130 mg: Small effect, liver reports
- Caffeine anhydrous 138 mg: Real stimulant; 34.5% of the FDA's daily guide in one capsule
- Green tea extract 130 mg: Small effect, liver-injury signal at high amounts
What do the SodaSlim packs include?
Each bottle holds 30 capsules, so the 3-bottle pack lasts 90 days and the 6-bottle pack 180 days at one a day.
The price and the money-back terms appear on the secure checkout. Read both there before paying.
90-day supply
3 bottles: 90 days
90capsules · price shown at checkout
Ships from the U.S. · money-back guarantee
Order 3 bottles
180-day supply
6 bottles: 180 days
180capsules · price shown at checkout
Ships from the U.S. · money-back guarantee
Order 6 bottlesA 2-bottle pack is also shown by the brand. Check your medicines with your doctor or pharmacist before you order.
FAQ01
SodaSlim questions people ask
What does green tea extract do to the stomach?
It can cause nausea and constipation, both listed by the NIH (NIH ODS, Weight loss supplements (consumers)). Taking a capsule with food may be easier on some stomachs, but the SodaSlim label sets no food rule. Stop the capsule if the upset lasts.
Can green tea extract raise blood pressure?
It can, according to the NIH (NIH ODS, Weight loss supplements (consumers)). Caffeine in the extract and in other lines also raises blood pressure. Anyone with high blood pressure should ask a doctor before using a capsule like SodaSlim.
Is the liver risk from green tea extract common?
No, it is uncommon. In a review of 34 trials, 4 reported liver events, mostly mild enzyme rises (Isomura 2016, Liver safety of green tea extracts (RCT review)). Rare does not mean zero, so learn the warning signs of dark urine, belly pain and yellow skin.
Who should skip green tea extract capsules?
People with a liver problem should skip them, per USP advice relayed by MSK (MSK, Green tea (About Herbs)). Ask first if you take nadolol, verapamil, statins or tamoxifen, and if you are pregnant or nursing. SodaSlim's label also bars under-18s.
Sources (4)
- Dietary Supplements for Weight Loss: Fact Sheet for ConsumersNIH Office of Dietary Supplements, 2021
- Green TeaNational Center for Complementary and Integrative Health, 2025
- Green TeaMemorial Sloan Kettering Cancer Center, 2026
- Liver-related safety assessment of green tea extracts in humans: a systematic review of randomized controlled trialsIsomura T, Suzuki S, Origasa H, et al., European Journal of Clinical Nutrition, 2016
Who wrote this02
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Pages built from the label, the seller’s materials and linked NIH, FDA, FTC, Mayo Clinic and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site of Thesodaslim, a USA authorized SodaSlim retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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