Tyrosine is needed to synthesize dopamine and norepinephrine, and tryptophan is needed to synthesize the neurotransmitter serotonin.

酪氨酸是合成多、甲肾上腺素所必须；色氨酸是合成神经递质血清素所必须。

They possess tryptophan, which helps create brain soothing hormones.

它们拥有色氨酸，帮助脑部释出舒缓荷尔蒙。

It contains tryptophan, a chemical in the brain that is used to produce serotonin.

它含有色氨酸，即一种在大脑中用来产生血清素化学物质。

Dude, that turkey tryptophan is really getting to me, man.

兄弟，那火鸡里色氨酸真让我不行了。

And tryptophan from our diets travels into the brain, where then the brain converts it into serotonin.

我们从饮食中摄取色氨酸会进入大脑，然后被大脑转化为血清素。

One particularly important product for the brain is the amino acid tryptophan.

一种对大脑特别重要产物是氨基酸色氨酸。

In these experiments participants' serotonin levels are lowered by depriving them of tryptophan.

在这些实验中，参与者血清素水平会因剥夺色氨酸而降低。

And so tryptophan remember is an amino acid.

所以，色氨酸是一种氨基酸，请记住这一点。

Dude, that turkey tryptophan is really gettin' to me, man.

伙计，火鸡色氨酸真让我着迷，伙计。

It's made from a amino acid called tryptophan.

它是由一种名为色氨酸氨基酸制成。

Where is the factory that turns tryptophan into the neurotransmitter serotonin?

色氨酸转化为神经递质血清素工厂位于哪里？

And you'll see tryptophan, and tyrosine, and phenylalanine, and quinone gas, and lactic acid, cholesterol.

你会看到色氨酸、酪氨酸、苯丙氨酸、醌类气体、乳酸、胆固醇等成分。

And with food, so things like tryptophan, we use tryptophan to turn into melatonin.

而在食物中，比如色氨酸，我们会利用色氨酸来转化为褪黑激素。

It's produced by bacteria in the gut when breaking down tryptophan.

它是由肠道细菌分解色氨酸时产生。

Tryptophan and amino acid, we've talked about before.

色氨酸是一种氨基酸，我们之前讨论过。

And in that way, they... What's tryptophan?

这样一来， 它们… … 色氨酸是什么呢？

The way it works is it's actually off when tryptophan or whenever that chemical is present.

其工作原理是，当色氨酸或其他类似化学物质存在时，系统实际上是关闭。

It is devoid in tryptophan and it is very low in the branch chain amino acids.

它不含色氨酸，且支链氨基酸含量非常低。

No, it's not fear of tryptophan.

不，这不是对色氨酸恐惧。

And what do I need in order to convert tryptophan to serotonin?

我需要什么才能将色氨酸转化为血清素？