Zinc is important for the specificity of more than 600 transcription factors in the regulation of different genes in human. However, a new study reported on Cell showed that Zinc inhibited the ferroxidase activity of a key protein APP, beta-amyloid protein precursor. This inhibition could lead to iron accumulation in AD plaques in brain. It is unknown whether higher blood zinc will lead accelerated progress of AD. We know many brands of  multi-vitamines contain zinc.