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

所以，一旦硫酸铵“捐献”出，就会变成巯丁氨酸。

Methionine is the rare amino acid that contains sulfur, an element known for its pungent odor.

硫氨酸是一种稀有氨酸含有硫，一种含有刺激性气味的元素。

So if you have too much methionine, you'd have too many methyl groups and you could accelerate aging.

所以，如果硫酸铵过多，就多，一多就会加速衰老过程。

For methionine to stimulate mTOR, it needs to donate a methyl group.

硫酸铵要激雷帕霉素蛋白（mTOR）的作用就必须“捐献”出一个。

Sometimes the condition comes about just because you've eaten too much methionine, which is in protein-rich foods, like meat and cheese.

所以产体味的原因就是你吃了太多的硫氨酸，存在于高蛋白食物中，比如肉和奶酪。

Methionine is very important for humans and animals.

硫氨酸对人类和动物都非常重要。

According to the study, the amount of methionine in the corn kernels increased by about 57 percent.

根据这项研究，玉米粒中蛋氨酸的含量增加了约 57%。

And the methionine and valine version has moderate metabolic rate of COMT, so it keeps a kind of moderate level.

而硫氨酸和缬氨酸版本的COMT具有中等代谢速率，因此能维持一种中等水平。

In severe cases, the inability to process methionine can lead to neurological problems and muscle weakness, among other problems in the nervous system.

在严重的例子中，处理硫氨酸的无能会导致神经性的障碍肌无力和其他神经系统的问题。

Again, treatment usually involves avoiding foods that contain methionine, as well as taking supplements to make sure that the body is getting what it needs.

同样的治疗方法通常包括避免含有硫氨酸的食物，同时吃一些能保证身体需要的营养品。

But if the cause is genetic, it can be due to mutations in one of several genes that are responsible for making the enzymes that help break down methionine.

但是如果起因是因，可以被归咎于一些能够成酶促使分解硫氨酸的因突变。

There's one polymorphism where you have either two methionines, two valines, or a methionine and a valine.

有一种多态性，其因型为两个硫氨酸、两个缬氨酸，或一个硫氨酸和一个缬氨酸。

So if you're getting methionine from muscle meat, it's not an issue if you're eating other glycine-rich parts of the animal like connective tissue and skin, or drinking bone broth.

所以，如果从肉食中摄入了硫酸铵，但同时又吃了富含甘氨酸的动物结缔织、皮肤或者喝了骨头汤，则不会有任何问题。

Essential amino acids, or EAAs, are amino acids that our body needs but cannot produce on its own, and there are 9 of them: Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

本氨酸，简称 EAA，是我们身体需要但不能自己产的氨酸，其中有 9 种：氨酸，异亮氨酸，亮氨酸，赖氨酸，蛋氨酸，苯丙氨酸，苏氨酸，色氨酸和缬氨酸。