Because the supplement contains only purified human grade ingredients, and the carrier is an extract, the product has a very long shelf life. If it is properly stored at room temperature, it retains full potency for up to 3 years from the date of bottling. Of course, we turnover our stock far more frequently (ie every 1-3 months) so the supplement sold is always fresh. Each bottle has the expiry date printed on it. The expiry is written in black ink on the jar itself above the label.