The rest mentioned above are capable of increasing the permeability of the gut and blood-brain barrier, contributing towards maldigestion and gastrointestinal problems , promoting neurological symptoms, and facilitating DNA and cellular damage
& Alexander, W
Oral supplements require higher doses because only approximately 1% is absorbed passively when intrinsic factor is impaired, making injections the most reliable method for pernicious anaemia and malabsorption conditions
Epigenetics in metal carcinogenesis: nickel, arsenic, chromium and cadmium
Hsieh, M.-J., Liu, H.-T., Wang, C.-N., Huang, H.-Y., Lin, Y., Ko, Y.-S., Wang, J.-S., Chang, V
Molecular analysis of the para locus, a sodium channel gene in Drosophila