The other worry about meat is homocysteine, homocysteine is well-known for its apparent contribution to heart disease.

关于肉食另忧是丁氨酸，众所周知，丁氨酸会导致心脏病。

So, once methionine donates that methyl group, it becomes homocysteine.

所以，旦甲酸铵“捐献”出甲组，就会变成丁氨酸。

As was discussed earlier in the video, you want to keep homocysteine down and you need B vitamins like B12 to do that.

正如本视频之前所讨论，丁氨酸水平不能高，维生素 B12 可降低丁氨酸水平。

This study also found that 16% of the omnivores, 38% of the vegetarians, and 67% of the vegans had high homocysteine levels.

这项研究发现，16% 杂食者、38% 素食者以及 67% 纯素食者丁氨酸水平偏高。

But, In order to get rid of the homocysteine, you need all the B vitamins. And... animal foods are quite high in B vitamins.

但是，摄入维他命 B 族能将丁氨酸排出体外，巧是，动物性食品中充满了 B 族维生素。