I've been hanging on herbal forums lately and the majority of herbalist feel that infusions are the best application of most herbs... tinctures and decoctions next but it can vary somewhat from herb to herb as to how best to release its potency. Capsules the least effective. I have no opinion at this point.. but I will be doing a course of Pau de Arco soon, and have been strongly advised by several to make a tea of it... not to take powdered in capsules... I am starting with tablets as that is what I have until my order arrives.
Steamed nettles served much like spinach is reported to clear out allergies if taken when the plant first appears in the spring. The steaming eliminates the prickleyness
I had a friend who had severe abdominal pain causing her to spend much time in the hospital under morphine. They could not and never did diagnosis the problem but likely related to her liver and or pancreas. Many tests were done and some quite invasive.
She cured herself according to her mothers plan, who resided in Poland... drink many cups of nettle tea a day and take the first urine orally in the morning. She is quite well now but she does have to avoid bread.