Green tea is great. I drink it three times a day after every meal (it can cause acid reflux if you drink it on empty stomach). Probably any loose tea (not in tea bags) will work but I have been drinking Gyokuro (probably the most expensive but I buy Chinese, which is cheaper) and Thai Nguyen (Vietnamese, cheap but good quality). I take a table spoon per cup, let it steep in 80 °C water for 20 minutes. Put tea in and let it cool in a teapot, no need to keep it on a stove to keep it at 80 °C. The