Not all scientific studies are of decent quality, especially when talking about medicine.
en.wikipedia.org
The
replication crisis (also called the
replicability crisis and the
reproducibility crisis) is an ongoing
methodological crisis in which it has been found that many scientific studies are difficult or impossible to
replicate or reproduce. The replication crisis most severely affects the
social sciences and
medicine,
[
Because the reproducibility of experimental results is an essential part of the
scientific method,
[7] an inability to replicate the studies has potentially grave consequences for many fields of science in which significant theories are grounded on unreproducible experimental work. The replication crisis has been particularly widely discussed in the fields of medicine, where a number of efforts have been made to re-investigate classic results, to determine both the reliability of the results and, if found to be unreliable, the reasons for the failure of replication.