Ox gallstones are gallstones found in some oxen and can be perceived at the moment of the slaughtering.
Their formation is mainly due to the accumulation of salts (biliary and calcium) in the gall bladder of beef.
To date, there has none successful research explaining what factors do determinate their formation.
However, it is known that ox gallstones are mostly found in older oxen, slaughtered tardily.
In eastern countries, ox gallstones are recognised and used for their medicinal value for more than two thousand years because they can reduce fever and eliminate toxic substances, Ox gallstones are also very commonly used in cases of high fever, loss of consciousness, convulsions, stroke, epilepsy, among others.