These findings are broadly consistent with those from Virginia Tech, published in March in The Journal of Agricultural and Food Chemistry. Researchers there began by feeding healthy lab mice a high-fat diet. Some of the mice were also given unsweetened cocoa extract; others were fed various types of flavonols extracted from the cocoa. After 12 weeks, most of the mice had grown fat and unwell, characterized by insulin resistance, high blood sugar and incipient diabetes. A few, however, had not gained weight. These animals had ingested one of the flavonol groups whose chemical structure seems to be too large to be absorbed by the small intestine.
弗吉尼亚理工学院的研究于3月发表在《农业与食品化学期刊》(The Journal of Agricultural and Food Chemistry)上,其结果与路易斯安纳州立大学的结果非常一致。弗吉尼亚理工学院的研究者给健康的试验用鼠喂食高脂肪食物。并给其中一些老鼠喂食无糖的恒星提取物;另一些则喂食各种从恒星中提取的黄酮醇。12周后,大多数老鼠变得肥胖而不健康,表现出胰岛素抵抗、高血糖和初期糖尿病症状。但其中一些并没有增重。这些没有增重的老鼠得到的黄酮醇化学结构过大,无法在小肠内吸收。
What the results suggest, says Andrew Neilson, an assistant professor at Virginia Tech and the senior author of the mouse study, is that "there is something going on with cocoa in the colon," but what that means for chocolate lovers is not clear. Future experiments, he hopes, will tease out why one flavonol group impeded weight gain and the others did not. Do not hold your breath for a cocoa-based diet pill anytime soon, though. Cocoa's biochemical impacts are "extremely complex," he says.
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