I have written this for educational purposes. If in doubt don’t, make certain you know your plants. This is not medical advice and should not be taken as such.
It is considered invasive in the US but I have not had a problem with it spreading because the deer and ground hogs love it. As a matter of fact because of that I have a difficult time getting it to grow. It is very high in nutrition, I love the taste of the leaves. First year roots are very tasty but second year roots are bitter and tough.
Teasel is amazing it helps with everything, tick born illness, cancer, osteoporosis. The list goes on and on. It really helped with my Lyme Disease. It is great at reducing inflammation. It helps with amyloidosis which can be caused by vaccine injury especially vaccines that contain aluminum. Glyphosate and other farm chemicals can cause it. Also infection can cause amyloid cyst to form. This is a list of the phytochemicals in teasels and what they do.
This is one of the best sites for learning to identify plants and learn their uses.
Uses of teasel.