大蒜精油是一种安全的、无毒的天然提取物。

Garlic essential oil is a safe nontoxic natural extract.

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研究表明：这种天然提取物还可以抑制过剩热量转换成脂肪。

Research suggests that this natural extract may also inhibit the conversion of excess calories to body fat.

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因此，苹果多酚作为一种天然提取物，在胃酸条件下对亚硝酸盐具有良好的清除作用。

Therefore, apple polyphenols as a natural extract has excellent clearance effect on nitrite in mimic gastric juice.

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