Thompson's Milk Thistle 42000 One-A-Day is a dietary supplement containing 35,000mg of Milk Thistle fruit per capsule. Milk Thistle (Silybum marianum) is an herb that has been traditionally used to support liver health and function. It contains a natural compound called silymarin, which has antioxidant and anti-inflammatory properties and is believed to help protect liver cells from damage. The recommended dosage is one capsule daily with food or as directed by a healthcare professional. As with any dietary supplement, it's important to consult with a healthcare professional before use, especially if you have a medical condition or are taking medications.