Any way to cure the intrinsic factor in the digestion system for the absorption of vitamin B12 complex?

Yes and No. Most intrinsic factor deficiencies are due to either partial gastrectomy or auto-antibodies that attacked the parietal cells of the stomach. In both, the damage may already be done. However, you can get B12 in the body in a few ways. 1) take a higher dose of B12 starting at 2mg (literature supported), 2) take sublingual drops (salivary gland absorption), 3) get im injections of methyl b12.