隔夜茶可以喝嗎?

常常還在掙扎到底隔夜茶可不可以喝嗎?

除了放到隔夜,只要是沖泡後沒有馬上喝完,還持續放置很長一段時間都算是隔夜茶哦!新鮮沖泡的茶原本含有對人體有益的蛋白質維生素胺基酸茶多酚等物質,但如果經過一段時間且沒有蓋上杯蓋或冷藏等加以妥善保存,維生素等營養成分會大量減少,空氣中的細菌與微生物也容易與茶中的蛋白質胺基酸產生作用,可能導致茶水變質腐敗,甚至有酸臭味,有害人體健康,因此還是現沖現喝隔夜茶不要飲用較為適當[1-4]。

除了營養流失,隔夜茶還會釋放出許多咖啡因單寧酸茶鹼,口感苦澀之外,容易刺激腸胃,破壞胃黏膜,導致腹瀉,同時這些物質含有大量的鉀離子,也會造成心悸或增加心臟負擔,對於腎臟功能不佳的人更應該特別注意[1-4]。

隔夜茶顏色較深且呈紅褐色,是由於茶中的茶多酚物質氧化成茶色素的緣故,雖然這些物質並不會危害人體健康,而且目前也尚未有研究證實隔夜茶確實會致癌,未變質的茶理當仍可以飲用[2-4],不過為了茶最佳的效果與風味,喝茶還是現泡現喝的好,一旦茶水變混濁濃稠時,就不應該繼續飲用。當然,對於外面的手搖飲料我們更無法確保是否為隔夜茶,所以還是與茶水部一起來支持新鮮現泡的天然茶湯吧!

部長茶舖裡的茶葉都是最支持現泡現喝,保持茶葉原本的清香與甘甜哦: https://www.littotea.com/shop/

-Research team @ 茶水部 LittoTea, 澄萃茶藝.

 

Issues of tea overnight

Tea overnight should be widely considered tea placed for a long time after brewing. It is advised not to drink tea overnight. Fresh tea containing protein, vitamins, amino acids and polyphenols benefits our health. However, the nutrition would disappear if placed too long or kept in the poor environment. Bacteria and microbes in air activate protein and amino acids in tea, which would lead to metamorphism and harms health as well. Therefore, we should not drink tea overnight[1-4].

In addition to the loss of nutrition, tea overnight releases more caffeine, tannic acid and theophylline, which makes tea bitter and harms stomach. Meanwhile, the material containing much potassium could cause palpitations. Therefore, those who have kidney problems should pay more attention to this[1-4].

The oxidation of polyphenols in tea makes tea overnight color darker red-brown, which won’t influence health. Although there is no clear research proving that tea overnight lead to cancer, it is suggested to drink fresh-brewed tea for better quality of tea[2-4]. Once tea becomes turbid, we should not drink it. Furthermore, we even don’t know whether bubble tea sold in beverage stores is tea overnight. Therefore, it is better to drink tea immediately after brewing. Let’s do this with LittoTea!

All tea in our shop is recommended to drink immediately after brewing with its original flavor: https://www.littotea.com/shop/

-Research team @ 茶水部 LittoTea, 澄萃茶藝.

 

Reference

[1]http://www.commonhealth.com.tw/article/article.action?nid=70589

[2]http://news.tvbs.com.tw/life/news-625734/

[3]http://www.healthsmall.net/2015/06/blog-post_99.html

[4]http://blog.xuite.net/longnar.tw/twblog/161480238-%E4%B8%AD%E9%86%AB%2F%2F%E9%9A%94%E5%A4%9C%E8%8C%B6%E7%9A%84%E5%AE%9A%E7%BE%A9%E5%8F%8A%E5%8A%9F%E7%94%A8%E3%80%82

Lynn Chiang

發表迴響