Weight Management
Green Tea
Also known as: EGCG, Epigallocatechin gallate, Camellia sinensis, Green Tea Extract
EGCG and caffeine combination for thermogenesis and fat oxidation.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Green Tea product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Thorne Green Tea Phytosome | 92 A | $0.57 |
| 2 | Transparent Labs Fat Burner | 92 A | $0.92 |
| 3 | NOW Foods L-Theanine | 91 A | $0.16 |
| 4 | Pure Encapsulations CurcumaSorb Mind | 90 A | $2.57 |
| 5 | Pure Encapsulations Green Tea extract (decaffeinated) | 90 A | $0.52 |
| 6 | Thorne L-Arginine Plus | 87 A | $1.25 |
| 7 | Thorne PolyResveratrol-SR® | 87 A | $1.97 |
| 8 | Pure Encapsulations PureCell | 87 A | $1.28 |
| 9 | Thorne MediClear-SGS™ - Vanilla | 86 A- | $2.10 |
| 10 | Thorne Ovarian Care | 86 A- | $0.42 |
| 11 | Pure Encapsulations Teavigo | 86 A- | $1.05 |
| 12 | Zhou Nutrition Green Tea Extract | 86 A- | $0.19 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Green Tea should I take?
The typical range is 300-500mg EGCG. Ongoing, cycle if desired
When should I take Green Tea?
With meals. Yes - reduces nausea.
Which form of Green Tea is best?
Capsule — Standardized EGCG. Other forms in the catalog: Powder, Standardized extract, Decaffeinated.
Is Green Tea safe?
Commonly reported: Nausea on empty stomach, Insomnia (caffeine content), Liver stress (rare). Serious warnings: Liver toxicity reported at high doses on empty stomach. Take with food, avoid high doses fasted
Which Green Tea supplement scores highest?
Thorne Green Tea Phytosome, at 92/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Fat oxidation
- Thermogenesis
- Antioxidant
- Metabolism
- Fat burning
What systematic reviews concluded
Outcomes that systematic reviews of Green Tea reached a verdict on: 6 with a benefit, 1 with no effect, 1 with harm reported, 2 unclear. Each is quoted from a review and linked to it on PubMed. How these were read.
Reviews found a benefit (6)
“Green tea supplementation is associated with modest reductions in SBP and DBP.” PMID 40497293
“Supplementation with green tea seems to be effective in reducing excess adiposity.” PMID 40326418
“Pooled effect sizes indicated that BM, BFP, BMI and MDA significantly reduced following GTE supplementation.” PMID 38031409
“Moreover, GTE as a nutraceutical dietary supplement can increase TAC and adiponectin.” PMID 38031409
“Overall, natural products provide measurable adjunctive benefits to SRP in the management of periodontitis, although further well-designed, standardized, and long-term randomized trials are necessary to support their routine clinical implementation.” PMID 41828611
“Meanwhile, therapies using Green Tea and Vitamin E were effective in reducing markers of cellular oxidative damage, with Green Tea also demonstrating dual efficacy in reducing serum ferritin (SF) and liver iron concentration (LIC).” PMID 41353598
Reviews found no effect (1)
“with no effects on FM, leptin and ghrelin.” PMID 38031409
Harm reported (1)
“healthcare professionals should be aware of the increased risk of bleeding when taking several food and herbs. These include Chinese wolfberry, chamomile tea, cannabis, cranberry, chitosan, green tea, Ginkgo biloba, ginger, spinach, St. John's Wort, sushi and smoking tobacco.” PMID 32478963
Not enough to say: glycemic control; stuttering symptoms.
1 finding from reviews in specific patient groups (such as cancer, pregnancy or surgery) is not shown here.
How it works
- Inhibits COMT (extends catecholamine action)
- Increases thermogenesis
- Synergistic with caffeine
Dosage
- Typical range
- 300-500mg EGCG
- Timing
- With meals
- With food
- Yes - reduces nausea
- Duration
- Ongoing, cycle if desired
- Special populations
- Weight management, antioxidant support
Forms
- Capsule
- Powder
- Standardized extract
- Decaffeinated
Safety
Common side effects
- Nausea on empty stomach
- Insomnia (caffeine content)
- Liver stress (rare)
Contraindications
- Liver disease
- Caffeine sensitivity
Products containing Green Tea
Top-scoring supplements in our catalog that list Green Tea on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Good evidence for modest fat loss effects
Grade B: Some human trials support key claims; further confirmation needed.
Cited research for Green Tea
Clinical studies referenced across Formulate guides that mention green tea. Each links to the full study page with PubMed source + the guides that cite it.
Related in Weight Management
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.