While reviewing the classical text, different methods for preparation of Naga Bhasma (incinerated lead) was described with and without Jarana (oxidation) but ultimately aim of the Jarana processis to convert the metals in to powder form.
"NAGA BHASMA (INCINERATED LEAD) PREPARED" by any method if used for human consumption is grossly irresponsible! Is it? Besides, the effluents of the oxidation process couldn't be rejuvenating either :-)