Merck Manual

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Milk thistle (Silybum marianum) seeds
Milk thistle (Silybum marianum) seeds

    Photograph of milk thistle (Silybum marianum) seeds. Silymarin, the most prominent active constituent of milk thistle seeds, demonstrates hepatoprotective, antioxidant, and anticancer benefits. Although many veterinarians recommend milk thistle derivatives for patients with liver disease, few are familiar with the actual plant product.

Courtesy of Dr. Narda Robinson.