Milk Thistle: Benefits and How to Use It

Updated July 4, 2026 · 5 min read · By the Mi Herbario editorial team

Milk thistle is a spiky plant long associated with liver wellness. Here's what it's traditionally used for and what the evidence says.

What is milk thistle?

Milk thistle (Silybum marianum) is a flowering plant whose seeds contain silymarin, its main compound.

Benefits

Traditional liver support

It's the classic herb associated with liver wellness, though evidence is still limited.

Antioxidant silymarin

Silymarin has antioxidant activity.

Usually taken as a supplement

Most people use standardized capsules or a tea.

How to take milk thistle

1. Follow the supplement label for standardized capsules.
2. As a tea, steep crushed seeds 10 minutes.
3. Don't use it as a substitute for medical care.

Precautions

Frequently asked questions

Is milk thistle good for the liver?

It's traditionally used for liver wellness, but evidence is limited and it doesn't replace medical care.

Does milk thistle detox your liver?

No supplement detoxes the liver; healthy habits do the real work.

How much milk thistle per day?

Follow the product label and your doctor's guidance.