也不要想要禁食肉类，健康是需要脂肪的，所以如果放弃所有脂肪类食品绝对不是一个好主意。
Also, don't go fat free: you need to have some fat in your diet to stay healthy, so giving up all fatty foods all the time isn't a good idea.
严格的素食主义者不吃肉，绝对素食者禁食所有畜产品，这些人也有B12缺乏的危险。
Strict vegetarians, who avoid meat, and vegans, who avoid all animal products, are also at risk of B12 deficiency.
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