Other reasons for using a second herbal supplement that were recorded by the survey, and the associated IPUMS NHIS variables, are:

• HER2DRUGCOST (Prescription or non-prescription drugs too expensive)

• HER2USHCREC (Health care provider recommended)

• HER2USIMMUN (Improved immune function)

• HER2USMEDCOST (Medical treatment too expensive)

• HER2USMEDFAIL (Medical treatment did not help)

• HER2MENT (Improved mental ability or memory)

• HER2PHYS (Improved physical performance)

• HER2USRELREC (Family or friends recommended)

• HER2SEX (Improved sexual performance)

• HER2USWELL (General wellness)

• HER2TREAT (Treat a disease or health problem)

• HER2PREV (Prevent a disease or health problem)

• HER2SAME1 (Whether taken for same reasons as 1st herbal supplement taken)

Parallel information was recorded on sample adults' reasons for taking their first herbal supplement. (See, for example, HER1SPORT.)

For information about the full range of variables related to natural herbs, including a definition of "natural herbs," see HERYR.