Is this true a miracle coffee? Users lost an average lost of 17 pounds in 12 weeks?

Natural diet supplements are not drugs at all; they are herbal products, which mean they contain ingredients from Mother Nature that aren’t harmful to your health. One key ingredient to look for in these natural supplements is Hydroxycitric Acid, or HCA. HCA is mainly found in fruit grown in India and parts of Asia. HCA is an important ingredient that allows you to lose weight without having to diet or exercise.
hi Norm. sorry I forgot to attach this one.

http://getfatburningsecret.com/diet/GarciniaCambogiaDiet/index.html

Quick Weight Loss Tips - How to Lose Weight Safely and Sustainably

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Do you have links to any studies that show an average 17 pounds of weight loss in 12 weeks?

The reason I''m skeptical is I have read disclaimers on many weight loss supplements where they say something to the effect of "Participants in the study took/ate/drank (fill in the blank) along with a sensible diet and regular exercise." What many people don''t realize is you can easily lose 17 pounds in 12 weeks simply by modifying your diet -- that''s right; no exercise required. The other thing people don''t realize is modifiying your diet and adding exercise can be the true cause for weight loss over time, whether a diet supplement like Hydroxycut is used or not.

Sounds like snake-oil to me...