American Herbal Products Association's
Safety Rating Classification for Herbs

Class 1:

• Safe with appropriate use.

Class 2:

• 2a: For external use only, unless otherwise directed by a professional.
• 2b: Not for use during pregnancy, unless otherwise directed by professional with expertise about using the particular substance during pregnancy.
• 2c: Not for use while breastfeeding, unless otherwise directed by professional with expertise about using a particular substance while nursing.
• 2d: Other restrictions according to professional guidance.

Class 3:

• Can be used only under the guidance of qualified professional (equivalent to requiring a prescription from a physician).

Class 4:

• Insufficient data for classification.