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Kathy: You asked for information about beta carboline. Like you, I had no luck at first. At a USDA database I was treated to an ominous disclaimer, but no data. Then, turning to http://www.lycos.com and using carboline as a search term, I found a dozen references that should make anyone think twice about using any product with a concentration of carboline for anyone with PD. This is what I learned: Beta carboline is an alkaloid that is an indole psychodelic chemical and a monoamine oxidase inhibitor. (MAOIs can be dangerous when combined with selegeline or Eldepryl.) Beta carboline is an active ingredient in the Passion flower (Passiflora incarnata), in Syrian Rue or Harmala (Peganum harmala), and in Yage (Banisteriopois Caapi). The concentration varies with the plant source and is particularly potent in the Syrian rue. The concentrates from these plants are used by those in the drug culture to experience a psychodelic high, primarily by inhaling smoke from a concentrated extract. The legality of using these products varies by locality. These references emphasize that the use of carboline can lead to death if its MAO inhibitor properties are not heeded, or if the concentration is too great. I really enjoy the mind expanding forays that often result when I read the messages on this list! More new things learned today. Martha