We often talk about tea in terms of its technicalities, the types there are, how it's grown, how it's processed, how to brew a good cuppa and so on. However tea drinking has been a way to pursuit spiritual growth aside of physical and spiritual health for thousands years. In the US and spreading back wards to the east are hypes of health benefit with scientific proofs along with products printed with TEA on cans bottles containing very little tea benefits. Are we regressing here? It has long been documented the benefit of camellia Sinensis thousands years ago plus its effects and side effects.
As long as I remember, my parents taught me not to drink tea brewed for a long time, especially tea left in a pot over night. I also read various articles in Chinese which talked about acid in tea become oxidized when left in open air for hours. Like anything become oxidized, it's no longer healthy for your body, or even intoxicates your cells. The harmful effects of left over tea are hardly brought up by scientists of the west. Iced tea, bottled tea, instant tea, powder tea mixtures that are made to meet the demand of today's fast pace, easy to prepared consumer mentality. They are still advertised as cancer preventitives. Made belief media hypes are really not educating our consumers with correct information. Anything spells T E A is not automatically healthy for your body.
My mother also taught me never take medication or vitamins with tea. It's a common knowledge among Chinese that only warm water is suitable for taking medication, unlike western medicines recommend water or juice. It's logical that you want to limit chemical reactions of medicine and liquid to take with. PH in anything other than clean water can alter the property of medicine. I try not to drink tea 1 to 2 hours before and after taking medications, which is recommended by many Chinese herbal doctors.
If you were already a tea drinker, you might as well drink it the right way to FULLY benefit from it.