The observational data on the large scale structure ( LSS ) of the Universe are used to establish the upper limit on the neutrino content marginalized over all other cosmological parameters within the class of adiabatic inflationary models .
It is shown that the upper 2 \sigma limit on the neutrino content can be expressed in the form \Omega _ { \nu } h ^ { 2 } / N _ { \nu } ^ { 0.64 } \leq 0.042 or , via the neutrino mass , m _ { \nu } \leq 4.0 eV .