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Researchers have not yet identified the optimal dose of silibinin. It’s felt that a supplement containing at least 250 mg per day of silibinin would be helpful for people with diabetes or Syndrome X, another disease in which disturbed glucose regulation harms the body. Doses of 150 to 300 mg per day are considered sufficient to increase the liver’s production of the protective antioxidant glutathione, while 400 to 800 mg per day are needed in cases of outright liver disease.
You can purchase silibinin in vitamin stores and pharmacies. Taking silibinin is felt to be the optimal way of obtaining the benefits of silymarin, so you may want to consider an extract that contains 80% silibinin, rather than the 35% seen in many brands. *