Silymarin Supply: What to Check Before Buying Milk Thistle Extract

Milk thistle extract quality varies more than any other botanical in the liver-health category. Silybin content by HPLC can differ dramatically from the 80% silymarin-by-UV figure on the label.

We publish both figures on every COA and control solvent residues for EU compliance. This note explains the UV-vs-HPLC gap and how to specify silymarin correctly.