White tea leaf extract is a concentrated supplement standardized to a specific polyphenol or catechin content. It delivers a steadier antioxidant dose per serving than brewed white tea. EGCG levels in white tea extract usually run lower than those found in green tea extracts.
Capsules or tablets are the common forms. Take them with meals to avoid stomach upset. Follow the label instructions carefully and keep your total daily EGCG intake under 800 mg to reduce stress on the liver.
High doses of concentrated catechin extracts can harm the liver, especially when taken on an empty stomach or above recommended amounts. White tea extract contains vitamin K and may interfere with blood thinners like warfarin. People with liver conditions, anyone pregnant or nursing, and those taking prescription medications should talk to a doctor before starting.