Here is a metadata analysis of over 1800 research papers by the Australian Government.
https://www.nhmrc.gov.au/_files_nhmrc/publications/attachments/cam02a_information_paper.pdf

Now let me be clear, preventative medicine is paramount to a sustainable, healthy society. However, that being said, I believe that it is a disservice to society to champion methodologies which are immoral and harmful. If anything is fake science, homeopathy fits the bill.

As for the placebo effect there are numerous studies which have been scratched because they were confounded by the placebo effect. However, an article for your consideration:
https://harvardmagazine.com/2013/01/the-placebo-phenomenon