I love using the mayoclinic.com for information, normally I use it for Nursing related stuff but I found this link about supplements.
Over-the-counter weight-loss pills: Do they work? - MayoClinic.com
Alli ??? OTC version of prescription drug orlistat (Xenical) Decreases absorption of dietary fat Effective; weight-loss amounts typically less for OTC versus prescription FDA investigating reports of liver injury.
Bitter orange Increases calories burned Insufficient reliable evidence to rate Possibly unsafe.
Chitosan Blocks absorption of dietary fat Insufficient reliable evidence to rate Possibly safe.
Chromium Increases calories burned, decreases appetite and builds muscle Insufficient reliable evidence to rate Likely safe.
Conjugated linoleic acid (CLA) Reduces body fat and builds muscle Possibly effective Possibly safe.
Country mallow (heartleaf) Decreases appetite and increases calories burned Insufficient reliable evidence to rate Likely unsafe and banned by FDA.
Ephedra Decreases appetite Possibly effective Likely unsafe and banned by FDA.
Green tea extract Increases calorie and fat metabolism and decreases appetite Insufficient reliable evidence to rate Possibly safe.
Guar gum Blocks absorption of dietary fat and increases feeling of fullness Possibly ineffective Likely safe.
Hoodia Decreases appetite Insufficient reliable evidence to rate Insufficient information
Over-the-counter weight-loss pills: Do they work? - MayoClinic.com
Alli ??? OTC version of prescription drug orlistat (Xenical) Decreases absorption of dietary fat Effective; weight-loss amounts typically less for OTC versus prescription FDA investigating reports of liver injury.
Bitter orange Increases calories burned Insufficient reliable evidence to rate Possibly unsafe.
Chitosan Blocks absorption of dietary fat Insufficient reliable evidence to rate Possibly safe.
Chromium Increases calories burned, decreases appetite and builds muscle Insufficient reliable evidence to rate Likely safe.
Conjugated linoleic acid (CLA) Reduces body fat and builds muscle Possibly effective Possibly safe.
Country mallow (heartleaf) Decreases appetite and increases calories burned Insufficient reliable evidence to rate Likely unsafe and banned by FDA.
Ephedra Decreases appetite Possibly effective Likely unsafe and banned by FDA.
Green tea extract Increases calorie and fat metabolism and decreases appetite Insufficient reliable evidence to rate Possibly safe.
Guar gum Blocks absorption of dietary fat and increases feeling of fullness Possibly ineffective Likely safe.
Hoodia Decreases appetite Insufficient reliable evidence to rate Insufficient information
