Each registered trial receives an identifier (on ClinicalTrials.gov, a code beginning with NCT) and its design becomes public: which compound is being studied, in whom, against which comparator and what the primary outcome will be. In many cases the results are also posted, even if they never reach a journal.
Prior registration tackles two problems. Publication bias, because it is known which studies started even if their results are not disseminated. And after-the-fact changes of objectives, because the primary outcome was fixed before the data were known.
For a specific compound, searching a registry is the fastest way to know whether there are human trials, what phase they are in and who sponsors them.
If a compound is presented with a lot of evidence but no registered trial appears, that evidence is most likely preclinical or anecdotal.
Related terms
Definition for educational and scientific purposes. It is not medical advice or a recommendation for use. NeoPeptidos products are sold labelled for research use only (RUO).