Milk thistle is a plant-based supplement that’s been used for centuries to treat liver and gallbladder diseases. It has many potential benefits, including improving liver function, reducing inflammation, and reducing the risk of certain types of cancer.

But while milk thistle may be beneficial in some cases, it’s important to understand the potential side effects before taking any supplement.

Side Effects of Milk Thistle

The most common side effects associated with milk thistle are nausea, diarrhea, gas, bloating, and upset stomach. These side effects usually subside after a few days of use.

In rare cases, milk thistle can cause allergic reactions such as rash or hives. If you experience any of these symptoms after taking milk thistle supplements, stop taking them and contact your doctor immediately.

Toxicity of Milk Thistle

Milk thistle is generally considered safe when taken in recommended doses. However, it’s possible to take too much.

Taking high doses of milk thistle can lead to overdose symptoms such as confusion, dizziness, vomiting, and diarrhea. It’s important to follow dosage instructions carefully and not take more than the recommended dose.

Who Should Not Take Milk Thistle?

Milk thistle is not recommended for pregnant or nursing women because there is not enough evidence to prove its safety for these populations.

People who have had an organ transplant should also avoid taking milk thistle supplements because they could interact with medications used to prevent organ rejection.

People with diabetes should also avoid taking milk thistle because it can interfere with blood sugar levels.

If you have any pre-existing medical conditions or allergies, talk to your doctor before taking this supplement.


Milk thistle is a popular supplement that has been used for centuries for its potential health benefits; however, there are some potential risks associated with it as well.

Before taking any supplement—including milk thistle—it’s important to do your research so you know what you’re getting into and how much you should be taking each day (the generally accepted daily dose is between 200-400 mg).

Talk to your doctor if you have any pre-existing medical conditions or allergies before starting a new supplement regimen so that they can monitor your progress and ensure that you are getting the most benefit from your supplementation program while avoiding potentially dangerous side effects or drug interactions.

Milk thistle might just be the answer you've been looking for - but only if done right!

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