PubMed comprises more than 24 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
Google “pubmed search tips” and you will find the PubMed Tutorial.
Medical papers fall into two broad categories
The papers on www.pubmed.org fall into two, very broad categories:
- Papers created by Universities;
- Papers created by the Pharmaceutical industry.
Both of these papers have an agenda:
- University papers are aiming to find something new. Therefore, they will often deal with compounds that are free or low cost, such as curcumin.
- Pharmaceutical industry papers aim to make money. There is nothing intrinsically wrong with this, and some of the greatest medical discoveries have been profit driven. However, you will certainly never find anything by the Pharmaceutical industry that recommends using any free or low cost compounds such as curcumin. You will never find a paper by the Pharmaceutical industry that deals with an orphan drug, i.e. a compound that is out of patient. Thus, take these types of papers with a grain of salt.
All papers, regardless of their agenda, should be examined in the light of best practices when it comes to statistical methodology.
If someone recommends a paper to you, ask them if the paper has any conflicts of interest, and if the paper follows best statistical practices.