Why would Metabolic go to the time, expense of a further trial...

Why would Metabolic go to the time, expense of a further trial for their obesity drug (not to mention credibility within their peer and business community if their research tells them otherwise? I lost out when they had the last trial -sold at a rather large loss but bought back in @ .48. I think they are a different organisation now with an very experienced and credible CEO. More drugs in pipeline and novel oral action technology will spin out to further opportunities. The risk with bio-stocks are high but so up the upsides.