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 €.

https://www.mcsformulas.com/vitamins-supplements/egcg/ref/14

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.