Why is methanol in aspartame? Is it dangerous?
为何阿斯巴甜中存在甲醇？ 是否危险？
In the body, when the artificial sweetener aspartame is digested, it is broken down into the metabolites phenylalanine, aspartic acid, and methanol. While methanol can be toxic in high amounts, the amounts that result from the digestion of aspartame in the body is lower than the likely exposure would be from many “natural” foods that contain methanol, like fruits and vegetables. According to American Cancer Society, drinking a liter of diet soda with aspartame would lead to the consumption of 55 milligrams (mg) of methanol, as compared to as much as 680 mg of methanol from a liter of fruit juice.
当人造甜味剂阿斯巴甜在人体内消化时，其被分解为代谢物苯丙氨酸、天冬氨酸和甲醇。尽管大量的甲醇具有毒性，但是由体内阿斯巴甜消化而产生的甲醇数量低于很多含有甲醇的“天然”食物（如水果和蔬菜）可能产生的接触水平。根据美国癌症协会的资料，饮用 1 升含阿斯巴甜的低糖苏水打可能摄入 55 毫克的甲醇，而饮用 1 升果汁可能摄入 680 毫克甲醇。