Well, I think starting a company, and gambling everything I have on the bet that I can make this work (and change the world in the process) is definitely a challenge.

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"I think people with positive views can change the world, not those with negative views, " he said.

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"I wanted to lose weight to challenge myself and show myself I can change, and not change for the world, " Garcia wrote in her iReport.

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If you're a pioneer and you come up with something that can change the world and you turn round and say 'I'm not going to share this idea with anyone' then you only impact the few and not the many.

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But then what I realized is if we can transform that into something that's positive that can actually effectively change the world, that can be a really valuable tool.

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"I believe it can be the foundation for the most effective legislation yet delivered on climate change anywhere in the world, but it still needs a lot of work".

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The company insists that after careful taste testing, no one will be able to tell the difference and it will taste exactly the same, but given some of the super tasters I have met through my work in the wine and spirits world, I find it virtually impossible that such a change in alcohol content can go unnoticed, especially with no additives to compensate.

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