Posted by maxime on July 27, 2003, at 15:46:54
In reply to Re: MAOI: what are fava beans? off topic to Don, posted by maxime on July 27, 2003, at 15:27:28
Hey Don- I found the answer. See below
Fava beans contain levodopa, the same chemical in Sinemet, Madopar, Dopar, Larodopa, and other levodopa-containing medicines used to treat Parkinsons disease (PD). In fact, the entire fava plant, including leaves, stems, pods, and immature beans, contains levodopa.
The amount of levodopa can vary greatly, depending on the species of fava, the area where it's grown, soil conditions, rainfall, and other factors. It appears that the young pod and the immature (green) beans inside the pod contain the greatest amount of levodopa, and the mature, or dried bean, the least. Three ounces (about 84 grams or ½ cup) of fresh green fava beans, or three ounces of canned green fava beans, drained, may contain about 50-100 mg of levodopa. If using the young pod as well as the beans, the amount of levodopa may be greater than that in the fresh beans alone.
Are there any problems associated with eating fava beans?
Yes, there a number of concerns to be aware of:
Variable levodopa amounts. Because fava plants have varying amounts of levodopa, it's possible to get either too much or too little levodopa. Too little levodopa will not relieve PD symptoms; and too much levodopa can cause overmedication effects, such as dyskinesia - particularly if other PD medications are being used at the same time. Also, the levodopa can cause nausea in some people.
Monoamine oxidase inhibitor (MAOI) use. Another consideration is the use of fava for people who take MAOIs. These include: isocarboxazid (Marplan); phenelzine (Nardil); tranylcypromine (Parnate); and selegiline (deprenyl, Carbex, Eldepryl).
MAOIs taken in combination with pressor agents (foods high in dopamine, tyramine and phenylethylamine), can bring about a dangerous, and sometimes fatal, increase in blood pressure. Levodopa in medications or in fava can convert to dopamine in the bloodstream. It should be noted that selegiline is a different type of MAOI (MAOI-type B), and in the amount normally used by people with PD (10 mg daily), it is not thought to pose a risk when used with dopamine. However, people using any MAOI should discuss foods containing pressor agents with their physicians and dietitians.