I'm a pretty new tea-drinker... I've lately been very into drinking tea, mostly for it's health benefits. And also I've heard that teas can keep you awake. Coffee makes me feel bloated and make my chest feels very uncomfortable, maybe due to the caffeine which is supposedly make you awake?
Recently, I've just bought some Japanese Sen-cha from Fukujuen. I tried the samples at the tea counter and bought one tin home since i liked it. A few hours later when i reach home and it's time for dinner, i felt super sleepy. My face almost fell flat into my plate of food. And that's only from the small cup of samples that i tried earlier that day.
Subsequently I've been trying this tea again on weekends night and as usual, after only about a few mouthful, i started to get really sleepy... so sleepy that it's painful to keep my eyelids open. Actually i'm drinking it now and my eyelids are starting to get heavy.
I have this kinda sleepy reaction with flowered teas too, esp rose.
However, i don't get this kinda of reaction from the green teas that i usually drink at Japaneses restaurant. strange...
I need a tea that helps to keep my mind alert and awake, esp during working hours. I've heard good things about Rooibos tea, good for the brain. thinking of getting the samplers. Though not sure what will be my reaction to it. Only one way to find out

What kinda teas do you recommend for keeping your mind awake?