I purchased this product after completing chemotherapy, radiation, and immunotherapy for Triple negative breast cancer. I was looking for something to keep my immune system on guard, after realizing that my genetic mutation gives me a lifelong disposition for cancer. I have been drinking this tea, almost nightly, for about eight months, and have not gotten sick one time, in spite of being around other sick people, on many occasions. It’s not a substitute for cancer treatment, but I do feel encouraged that my immune system now seems to be operating better than it ever has in the past. I used to get sick very with something, every 2-3 weeks. Honestly, I’m recommending this to everyone!