飲食會影響睡眠品質！ 雖然覺得有些意外，不過了解睡眠機制後，就能明白飲食如何影響睡眠品質了。其中的關鍵字就是──色胺酸（Tryptophan，編按：人體不能合成的必需胺基酸，須從食物中汲取）。

由於累了就想睡的身體恆定性機制，以及人體生來就具有的生理時鐘機制發生作用，所以我們會想睡覺。

這兩個人體機制會因應各種不同狀況、互相關聯與作用，進而控制睡眠時間並調整質與量。

色胺酸與上述兩種機制中的生理時鐘有關。如前文所述，每當天色變暗，生理時鐘就會分泌褪黑激素以誘發睡意。其中，不斷提到的褪黑激素，其實就是由色胺酸所製造出來的。

The essential amino acid L-tryptophan helps support relaxation, restful sleep, and positive mood. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response and sleep/wake cycles. L-Tryptophan also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.

Suggested Use
1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 capsules before bed.

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