Is Zerona Effective?

I've heard and read mixed reviews on this. As it needs to follow a strict diet and exercise regime and not to mention following the intake of dietary supplements, does it actually work? I mean, we can lose weight and inches from the diet and exercise itself so why need Zerona? What does it helps in actually? There's one doctor who says the laser cannot penetrate into the skin. Is it true? Why FDA approve this?

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