Abstract <p>The Borexino detector has the ability to detect antineutrino fluxes along with solar neutrinos. Antineutrino fluxes are generated inside the Earth by isotopes of natural radioactivity and on the Earth’s surface by reactor cores of nuclear power plants. We analyzed the latest data from the Borexino detector using solar neutrino fluxes and antineutrino ones, adding them to the known backgrounds. As a result, a nonzero antineutrino flux from ⁴⁰K was found. At the same time, all solar neutrino fluxes began to be consistent with the low-metallicity Sun model.</p>