Li abundances as a function of the heavy-element fraction for stars with 0.70 < M/M_⊙ < 0.90 and Z < 0.006. For each of the four mass intervals, the fit given in Eq. (2) is shown as a straight line corresponding to the mean mass of the group indicated at the line. The dashed line shows the sum of the primordial Li abundance predicted from standard BBN calculations and ⁷Li made in the Galaxy due to cosmic ray and stellar nucleosynthesis reactions according to Prantzos (2007).