  The transition between the Main Sequence and the Red Giant Branch in low mass
stars is powered by the onset of the CNO burning, whose bottleneck is the
$^{14}$N(p,$\gamma)^{15}$O. The LUNA collaboration has recently improved the
low energy measurements of the cross section of this key reaction. We analyse
the impact of the revised reaction rate on the estimate of the Globular
Clusters ages, as derived from the turnoff luminosity. We found that the age of
the oldest Globulars should be increased by about 0.7-1 Gyr with respect to the
current estimates.
