^ actually I just went to greentea.com and it's from the brand I just started using-Salada, cheap AND good! It says you only need to steep 2-3 mins, the normal amount, and that they way they decaffinate their teas only uses spring water and effervescence which preserves the antioxidants!
Here are their tips for brewing:
To brew Salada Green Tea properly
1. Bring cold tap water to a boil in a kettle
2. Remove the kettle from the heat and allow it to stand for 1 to 3 minutes
3. Pour the hot water over the tea bag, using 1 tea bag per cup
4. Allow the tea bag to steep for 2 to 3 minutes and remove
5. Add orange or lemon and sweetener if desired
We further recommend that you allow the green tea to cool for another three minutes.
When brewing Salada Green Tea Flavors, use freshly boiled water to fully release the aroma and the flavor. Allow the tea bag to steep for 3 minutes and than set aside for 3 minutes.
Following these instructions will bring out the subtle flavors that make green tea one of the most popular beverages in the world.
They say that right now 4+ cups a day are recommended for the maximum health benefits, but research is ongoing.
In my opinion, if you even have at least 1 cup a day it's still good for you, just the very best is 4+ !