Lemon water helps to turn an acidic body into an alkaline one. Bacteria and viruses thrive in an acidic body, so we want to do all we can to keep our bodies in a slightly alkaline state.
Teasel is for sale in many places on the internet, and if you have an herbalist, you can ask them. Most of it is in the form of a tincture I believe, so you would add it to about
3 or 4 tablespoons of water to take.
I think you will find this link quite helpful:
buhnerhealinglyme.com/herbs/teasel-root-tincture/