  We compute the isospin asymmetry distribution in the rare dileptonic decay $B
\to K^* \mu^+ \mu^-$, in the dimuon mass squared ($q^2$) region below the
$J/\Psi$ resonance, using non-perturbative inputs as predicted by the anti-de
Sitter/Quantum Chromodynamics (AdS/QCD) correspondence and by Sum Rules. We
predict a positive asymmetry at $q^2=0$ which flips sign in the region $q^2 \in
[1,2]~\mbox{GeV}^2$ to remain small ($\le 2\%$) and negative for larger $q^2$.
While our predictions are distinct as $q^2 \to 0$, they become hardly
model-dependent $q^2 \ge 4~\mbox{GeV}^2$. We compare our predictions to the
most recent LHCb data.
