# Sourcing Quality EGCG EGCG is the best-studied catechin in **green tea**, so sourcing quality depends heavily on how a product standardises and delivers that catechin. ### What to look for 1. a clearly standardised green tea extract 2. stated EGCG content, not just total green tea weight 3. clarity on caffeine content or decaffeination 4. minimal fillers and unnecessary additives 5. cautious positioning around high-dose concentrated extracts ### Why this matters Not all green tea products are equivalent. A product may advertise green tea, but provide little meaningful EGCG per serving. Others may provide highly concentrated catechin extracts that bring both more potency and more liver-risk potential. ### Bioavailability and strength vary greatly Most people know green tea as a drink, but supplement products vary enormously in how much actual EGCG they deliver. The useful questions are: * how much EGCG is actually present? * how concentrated is the extract? * does the product contain caffeine? * is the extract likely to be used at doses where liver risk becomes more relevant? ### Practical takeaway For oncology-oriented use, the goal is not simply to find the highest number on the label. The goal is to balance: * actual EGCG content * formulation quality * tolerability * caffeine handling * safety at the intended dose ### Trusted EGCG options MCS currently has **two strong green tea catechin options**, and the better choice depends on whether the reader wants **maximum isolated EGCG** or a **broader decaffeinated green tea catechin extract**. #### MCS Formulas EGCG Product Comparison * **EGCG 80%** * 400 mg EGCG per capsule * 80% EGCG standardisation * 31.70 € * best for readers who want higher isolated EGCG and more precise protocol-style dosing * **Super Green Tea Extract** * 580 mg extract per capsule * 348 mg EGCG per capsule * 60% EGCG from a fuller green tea extract * 24.95 € * decaffeinated * vegan * 100% pure extract with no added ingredients * best for readers who want a broader catechin spectrum, lower cost, and confirmed decaffeinated use #### What does the difference mean in practice **EGCG 80%** is the more targeted option. It gives the highest isolated EGCG per capsule and makes sense for readers following a protocol where EGCG itself is the main priority. **Super Green Tea Extract** is the broader green tea option. It still provides a strong EGCG dose, but also keeps the fuller catechin profile. That may appeal to readers who want something closer to a whole green tea extract rather than an isolated EGCG-focused formula. The decaffeinated status of the **Super Green Tea Extract** is also a practical advantage for caffeine-sensitive readers or anyone taking it later in the day. ### Practical buying logic When comparing EGCG products, the most important questions are: 1. how many milligrams of **actual EGCG** does each capsule provide? 2. what percentage of the extract is standardised to EGCG? 3. is the product clear about caffeine content? 4. is the dose likely to be used in a range where liver monitoring becomes more relevant? That is why a well-standardised EGCG product is usually more useful than a vague green tea extract label with no clear catechin breakdown. **Trusted product:** MCS Formulas EGCG 80%\ 400 mg EGCG per capsule. 31.70 €. Use the code `abbey5` at checkout to save 5% and help support the free Healing Cancer Study Support resources. **Alternative or combination option:** MCS Formulas Super Green Tea Extract — 580 mg extract per capsule, 348 mg EGCG, decaffeinated. 24.95 €. Use the code `abbey5` at checkout to save 5% and help support the free Healing Cancer Study Support resources. {% hint style="warning" %} This information is for education only. It is not medical advice, diagnosis, or treatment. Please speak with a qualified clinician before making changes to care, medication, or supplement use. {% endhint %} {% hint style="info" %} © 2026 Abbey Mitchell. All rights reserved. Please share by URL rather than copying page text. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://myhealingcommunity.gitbook.io/myhealingcommunity-docs/natural-medicines/egcg-in-oncology/sourcing-quality-egcg.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.