Is it safe to take herbal liver tonics sold at health stores?

What's actually in it

Turmeric extract, green tea extract, milk thistle, ashwagandha, kratom, and black cohosh all show up in liver-support blends. The dose in a supplement capsule is usually many times higher than what you'd get from food. The ingredients aren't required to be tested the way drugs are, and the FDA only steps in after reports of harm.

The liver processes everything you swallow. A concentrated plant extract that's mild in tea form can become harsh when 20 cups' worth are packed into a pill.

What the research says

A 2026 analysis in Front Gastroenterol reviewed 386 alternative medicinal products implicated in liver injury. Several plant ingredients showed up repeatedly: high-dose green tea extract, turmeric, ashwagandha, black cohosh, and kratom. Injury ranged from mild enzyme elevations to acute liver failure requiring transplant. The products were from regular health stores and online retailers, not shady overseas sellers.

If a specific medical reason for liver support exists, a gastroenterologist is the right person to guide it. For general wellness, the boring advice wins: sleep, less alcohol, fewer ultra-processed foods, normal weight, and vegetables. None of those come in a capsule. If you do take a supplement, stick to products that have been third-party tested (USP or NSF verified) and tell your doctor what you're taking so routine liver labs can catch problems early.