Bitter orange

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Bitter Orange
Twenty one million dollars worth of bitter orange was sold last year on the promise that it can boost weight loss or relieve allergies. However, this supplement can cause heart attack, stroke or even death. Bitter orange contains a stimulant similar to ephedrine, banned by the FDA in 2004 after two people died and several suffered heart attacks or strokes. This was the first time the FDA banned an herbal supplement, and bitter orange has many similar chemical properties.

Keep in mind: It is important to remember to exercise caution when taking any form of supplement. Make sure to read labels carefully and discuss with your doctor, especially if you are already taking any prescription medications.
Lobelia

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Lobelia
Also known as asthma weed, people take lobelia seeking a relief from symptoms of asthma and bronchitis. But lobelia can cause rapid heart rate and a high dose can cause severe low blood pressure, coma or death.
Yohimbe

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Yohimbe
This sexual enhancement supplement had sales of up to $14 million last year. Men and women alike try it as an aphrodisiac, while some men also take it for erectile dysfunction. Yohimbe can cause serious heart problems, including high blood pressure and rapid heart rate, and it may contain a prescription-strength chemical that should only be taken under a doctor’s supervision. Nearly 20 years ago, the FDA issued a warning about the adverse side effects of yohimbe.

Next: 3 key supplements you should be taking
As a reminder, always consult your doctor for medical advice and treatment before starting any program.