I have a small culinary/medicinal herb garden. Herbs totally fascinate me (& deer don’t eat them for the most part). Dr. Ealy says God put everything we need on this earth to take care of our bodies & I generally subscribe to that thought. I ran across this interview with Dr. Patrick Jones (he’s a vet, not MD) discussing herbs for Spring allergies (which I am fighting right now & I have a histamine intolerance/chronic hives) so I was very interested. You might be as well:
https://homesteadliving.com/the-coop-ep-03-combat-spring-allergies-with-dr-patrick-jones/
Dr. Jones grows his own medicinal herbs & sells them here:
https://homegrownherbalist.net/
After looking at nettle leaf on Amazon, I would trust Dr. Jones’ products above the Amazon offerings, but do your own research.
Stinging nettle is very invasive so I’d rather not have it in my garden. When hiking in the mountains, we would come across huge patches of it in low areas & along creeks (woe unto you if you were wearing shorts!) & knowing what I now know, that would have been a good opportunity to harvest some of it. Some backpackers would pick & boil - good source of vitamin C.
Beau has made Nettle Tea in the spring a time or two. If I just LOOK at a Nettle I break out in blisters, though I did try some of his ‘Spring Tonic’ with no ill effects.