What is the caffeine content in ginseng?

I plan on buying some Korean red ginseng and add it to my homemade beverages. I need to know how much caffeine is in it.|||i don't think there is any caffeine at all and if there is any, it is a very little amount. this site i found is helpful about caffeine and ginseng so check it out.|||I'm pretty sure ginseng is its own drug. There's no caffeine in it. I think.