Popular weightloss pills

Herbal or dietary supplement	The claims	What you need to know
Bitter orange	Decreases appetite	Touted as an "ephedra substitute" but may cause health problems similar to those of ephedra Long-term effects unknown
Chitosan	Blocks the absorption of dietary fat	Relatively safe, but unlikely to cause weight loss Can cause constipation, bloating and other gastrointestinal complaints Long-term effects unknown
Chromium	Reduces body fat and builds muscle	Relatively safe, but unlikely to cause weight loss Long-term effects unknown
Conjugated linoleic acid (CLA)	Reduces body fat, decreases appetite and builds muscle	Might decrease body fat and increase muscle, but isn't likely to reduce total body weight Can cause diarrhea, indigestion and other gastrointestinal problems
Country mallow (heartleaf)	Decreases appetite and increases the number of calories burned	Contains ephedra, which is dangerous Likely unsafe and should be avoided
Ephedra	Decreases appetite	Can cause high blood pressure, heart rate irregularities, sleeplessness, seizures, heart attacks, strokes and even death Banned from the marketplace because of safety concerns, but may still be legally sold as a tea Despite the ban, many ephedra products still sold on the Internet
Green tea extract	Increases calorie and fat metabolism and decreases appetite	Limited evidence to support the claim Can cause vomiting, bloating, indigestion and diarrhea May contain a large amount of caffeine
Guar gum	Blocks the absorption of dietary fat and increases the feeling of fullness, which leads to decreased calorie intake	Relatively safe, but unlikely to cause weight loss Can cause diarrhea, flatulence and other gastrointestinal problems
Hoodia	Decreases appetite	No conclusive evidence to support the claim