Let's start with the basics. Silymarin isn't some lab-created chemical—it's a group of natural compounds called flavonolignans, found primarily in the seeds of the milk thistle plant (*Silybum marianum*). Think of it as the "powerhouse" inside milk thistle: while the plant itself has been used in traditional medicine for centuries (ancient Greeks even used it for liver complaints), silymarin is the active ingredient that's been studied for its health benefits.
To get silymarin, manufacturers extract it from milk thistle seeds using solvents like ethanol or supercritical CO2. The result? A concentrated powder or liquid that's then used in supplements, skincare products, and even some functional foods. Most high-quality supplements will list "silymarin" on the label, often specifying the percentage (like "80% silymarin"), which tells you how much of the active compound is in each dose.



