  Nuclear interactions of ions accelerated at the surface of flaring stars can
produce fresh isotopes in stellar atmospheres. Although this nucleosynthesis is
not significant for the chemical evolution of the Galaxy, it can be important
for a number of measurements of "anomalously" high 6-Li and 7-Li abundances. We
discuss the possible role of stellar flares to explain the recent report of
high 6-Li abundances in metal-poor halo stars and the well-established
correlation between Li abundance and stellar activity in young open clusters.
We then study the possibility of observing directly Li production during flares
of nearby and active dwarfs of spectral type M.
