How much Foti to take?

I just bought some foti powder that said 10:1 extract. If I understand it right, 10:1 means it needed 10 parts of foti root to get 1 part of the benefial components. My questions are:

1. Could you explain what this mean?

2. How much can I take per day in order to reverse (hopefully) my graying?

3. I am a little concern because the powder tasted kind of sweet and good, not bitter like I anticipated. This is a herb that can eat and actually enjoy!

You input is very much appreciated.

LongNhi

PS: Welcome back!  I hope that you had a great time relaxing and sightseeing. I have to refrain myself from asking until I see the list starts to go down; my question somewhat falls in the category of vanity  and there are others that have much more important issues to ask; it feels a little odd to be ahead of those people. But if you are back and can answer so quickly, I thought may be I can fall into that small crack without disturbing the need of others too much.