Chromium is an essential trace element for organism and the essential ingredient to keep GTF's activity.

铬是人和动物所必需的微量元素，是GTF(葡萄糖耐量因子)的必要活性成分。

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Chromium is an essential trace element for organism and the essential ingredient to keep GTF's activity.

铬是人和动物所必需的微量元素，是GTF(葡萄糖耐量因子)的必要活性成分。

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