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Milk thistle for pets: Any long-term side effects to worry about?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | unneutered | 1 year and 9 months old

Does milk thistle / silymarin has any long term side affect on any part or organ of thw body if yes then please state what are those affects?

1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on August 30th, 2017

Milk thistle appears to be a safe and well-tolerated herb for animals. Side effects are usually mild and often involve the gastrointestinal tract, such as loose stools or mild digestive upsets. It is not recommended to be given to pregnant animals. I would not personally be worried about side effects at all when using this. Hope that answers your questions.

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