220px-PDB 1up6 EBI

GH4, or growth histogenesis-4, is a hyperaudial membrane protein most notable for being claimed to be capable of enhancing the listening capability of the human ear. Laboratory-based cultivation is reportedly prohibitively challenging. It has been confirmed to be present in blueberries. Although first discovered in 1934, significant research on its properties was conducted only two decades later by the Chelyabinsk State Medical University, in Chelyabinsk Oblast, Russia.


The first known documentation of GH4 was by Russian chemist Aleksandr Solznikoff, who, in 1934, was examining the chemical structure of blueberry cells, initially while searching for ways to increase blueberry production in the Soviet Union. Since the opening of the Soviet archives following the dissolution of the Soviet Union, some Russian-language documents on Solznikoff's research have become publicly accessible, but remain untranslated.

Alleged Use[]

GH4 was allegedly experimented with during the late 1970s by numerous militaries looking to reduce or alleviate damage to the eardrums of soldiers. It should be noted, however, that no fully credible sources exist to back up these claims.


GH4 is most notably found in member species of the vaccinium genus.

Citations and Sources[]

[1] State Archive of the Russian Federation, Zametki o razvitii selgo khozyaystva cherniki (заметки о развитии сельского хозяйства черники), 1934 (untranslated)