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Name
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In products
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Dangers
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Regulatory actions
DEFINITELY HAZARDOUS
Documented organ failure and known carcinogenic
properties
Aristolochic
acid
(Aristolochia, birthwort, snakeroot, snakeweed,
sangree root, sangrel, serpentary, serpentaria; asarum canadense, wild
ginger)
Växa PMS-Ease,
Shanghai Chinese Herbal Company Cardioflex (Guan Xin Su He Wan), Min Shan Brand
Long Dan Xie Gan Wan
Potent human
carcinogen; kidney failure, sometimes requiring transplant; deaths reported.
FDA warning
to consumers and industry and import alert, in April 2001. Banned in 7 European
countries and Egypt, Japan, and Venezuela.
VERY
LIKELY HAZARDOUS
Banned in other countries, FDA warning, or adverse effects in studies
Comfrey
(Symphytum
officinale, ass ear, black root, blackwort, bruisewort, consolidae radix,
consound, gum plant, healing herb, knitback, knitbone, salsify, slippery root,
symphytum radix, wallwort)
American Health
& Herbs Ministry Asthma Formula 1040 Tincture
Abnormal liver
function or damage, often irreversible; deaths reported.
FDA advised
industry to remove from market in July 2001.
Androstenedione
(4-androstene-3, 17-dione, andro, androstene)
AST Sports
Science Andro100, SDI-Labs D-Bol Methadrostenol, Young Again Nutrients
Androstene Dione
Increased
cancer risk, decrease in HDL cholesterol.
FDA warned
23 companies to stop manufacturing, marketing, and distributing in March 2004.
Banned by athletic associations.
Chaparral (Larrea
divaricata, creosote bush, greasewood, hediondilla, jarilla, larreastat)
Arizona Naturals
Chaparral tablets, American Health & Herbs Ministry Bowel & Liver
Cleanser Tincture, Larreacorp Ltd. Larreastat
Abnormal liver
function or damage, often irreversible; deaths reported.
FDA warning
to consumers in December 1992.
Germander
(Teucrium chamaedrys,
wall germander, wild germander)
Nature's Wonderland
Germander Herb Powder
Abnormal liver
function or damage, often irreversible; deaths reported.
Banned in
France and Germany.
Kava
(Piper
methysticum, ava, awa, gea, gi, intoxicating pepper,
kao, kavain, kawa-pfeffer, kew, long pepper, malohu, maluk, meruk, milik,
rauschpfeffer, sakau, tonga, wurzelstock, yagona, yangona)
NutriBiotic MetaRest,
Ancient Herbs Relaxit, BlueBerry Matrix Herbal Stress Relief and Relaxation
Enhancement Tablet
Abnormal liver
function or damage, occasionally irreversible; deaths reported.
FDA warning
to consumers in March 2002. Banned in Canada, Germany, Singapore, South Africa,
and Switzerland.
LIKELY
HAZARDOUS Adverse-event reports or
theoretical risks
Bitter
orange (Citrus
aurantium, green orange, kijitsu, neroli oil, Seville orange, shangzhou
zhiqiao, sour orange, zhi oiao, zhi xhi)
Xenadrine EFX,
Metabolife Ultra, NOW Diet Support
High blood
pressure; increased risk of heart arrythmias, heart attack, stroke.
None

Organ/glandular
extracts (brain/adrenal/pituitary/
placenta/other gland “substance” or “concentrate”)
Healthgenesis.com
Brain Concentrate capsules, Plymouth Bell Labs Multigland-F Aspen GroupGlan-Fem
Plus
Theoretical
risk of mad cow disease, particularly from brain extracts.
FDA banned
high-risk bovine materials from older cows in foods and supplements in January
2004. (High-risk parts from cows under 30 months still permitted.) Banned in
France and Switzerland.
Lobelia (Lobelia
inflata, asthma weed, bladderpod, emetic herb, gagroot, lobelie, indian
tobacco, pukeweed, vomit wort, wild tobacco)
Nature’s
Way Lobelia
Herb respiratory tonic, Nature’s Way Breathe-Aid, American Health & Herbs
Ministry Asthma Formula 1040 Tincture
Breathing
difficulty, rapid heartbeat, low blood pressure, diarrhea, dizziness, tremors;
possible deaths reported.
Banned in
Bangladesh and Italy.
Pennyroyal oil
(Hedeoma pulegioides,
lurk-in-the-ditch, mosquito plant, piliolerial, pudding grass, pulegium,
run-by-the-ground, squaw balm, squawmint, stinking balm, tickweed)
Nature’s Answer
Pennyroyal Herb Extract, Nature’s Wonderland Pennyroyal Herb capsules,
American Health & Herbs Ministry Pennyroyal Tincture
Liver and
kidney failure, nerve damage, convulsions, abdominal tenderness, burning of the
throat; deaths reported.
None

Scullcap (Scutellaria
lateriflora, blue pimpernel, helmet flower, hoodwort, mad weed, mad-dog
herb, mad-dog weed, quaker bonnet, scutelluria, skullcap)
Solaray Skullcap
Capsules, American Health & Herbs Ministry Appetite Stimulant Formula
Tincture
Abnormal liver
function or damage.
None 
Yohimbe
(Pausinystalia yohimbe, johimbi,
yohimbehe, yohimbine)
Twinlab Yohimbe
Fuel, Nature’s Purest Herbal Niagara, K-Max Power-for-Men Pure Yohimbe Bark
Extract
Change in
blood pressure, heart arrhythmias, respiratory depression, heart attack; deaths
reported.
None
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