Milk Thistle is well-known as an herb that’s beneficial to the liver, which is the body’s master processor of hormones. Hormone balance is key to lactation, but it’s only the extract of milk thistle (called Silymarin) that works to increase breastmilk production. Silymarin has been shown to be more than twice as effective as placebo. Our supplement is the only one to have 80% silymarin extract for maximum potency.