Aristolochic acid
Dangers: Potent human carcinogen; kidney failure, sometimes requiring transplant; deaths reported.
Comfrey
Dangers: Abnormal liver function or damage, often irreversible; deaths reported.
Androstenedione
Dangers: Increased cancer risk, decrease in HDL cholesterol.
Chaparral
Dangers: Abnormal liver function or damage, often irreversible; deaths reported.
Germander
Dangers: Abnormal liver function or damage, often irreversible; deaths reported.
Kava
Dangers: Abnormal liver function or damage, occasionally irreversible; deaths reported.
Bitter orange
Dangers: High blood pressure; increased risk of heart arrhythmias, heart attack, stroke.
Organ/glandular extracts
Dangers: Theoretical risk of mad cow disease, particularly from brain extracts.
Lobelia
Dangers: Breathing difficulty, rapid heartbeat, low blood pressure, diarrhea, dizziness, tremors; possible deaths reported.
Pennyroyal oil
Dangers: Liver and kidney failure, nerve damage, convulsions, abdominal tenderness, burning of the throat; deaths reported.
Scullcap
Dangers: ABnormal liver function or damage.
Yohimbe
Dangers: Change in blood pressure, heart arrhythmias, respiratory depression, heart attack; deaths reported.
Thanks Lynn.
Gale, Vee, Babs, Jello, Snow and Lindy,