  In this work we investigate the helicity regularity for weak solutions of the
incompressible Euler equations. To prove regularity and conservation of the
helicity we will threat the velocity $u$ and its $curl\, u$ as two independent
functions and we mainly show that the helicity is a constant of motion assuming
$u \in L^{2r}_t(C^\theta_x)$ and $curl \,u \in L^{\kappa}_t(W^{\alpha,1}_x)$
where $r,\kappa $ are conjugate H\"older exponents and $2\theta+\alpha \geq 1$.
Using the same techniques we also show that the helicity has a suitable
H\"older regularity even in the range where it is not necessarily constant.
