I don't know whether the tea your drinking is caffine free, most teas do contain some caffine. Herbal infusions are usually caffine free.
Before you consider ginsing or ginko it might be advisable to discuss it with your doctor after getting some detailed information about them from a herblist. If taken as a supplement they have some health benefits. Ginsing, strengh and stamina, Ginko, circulation.
The effect on photoreading.. gingo may help blood circulation to the brain (so does drinking plenty of water before and during a photoreading session). That helps for improving memory and learning.
Caffine on the other hand dehydrates the body and is known to have a detrimental effect on thinking and learning.
A simple way to benefit from the photoreading process is really just to drink plain water. It wards of headaches and keeps the photoreading process relaxed. Anything else would really be to benefit other areas in your life.
Alex
