Short answer: Concentrated EGCG (green tea extract) has been associated with rare cases of liver stress at high doses; avoid combining with other high-dose green tea extract products.
Why "rare cases" and "high doses" are careful, specific qualifiers
This phrasing avoids overstating the risk while still taking it seriously — a genuinely balanced way to disclose a real, if uncommon, safety consideration.
Why combining products specifically is flagged
Avoid combining with other high-dose green tea extract products — a direct, practical instruction relevant if you're also taking a separate green tea supplement.
⚠️ Worth knowing: if you have liver concerns or take other liver-processed supplements, this specific caution is worth discussing with your doctor first.