The parenteral administration also halts the progression of neurological damage associated with B12 deficiency, but the complete improvement of the condition may depend on the severity and extent of the deficiency
doi:10.1111/j.1472-765X.2011.03042.x Nobaek S, Johansson ML, Molin G, Ahrn S, Jeppsson B
This bypasses the digestive system, allowing water, medications, blood products, or nutrients to quickly enter the bloodstream and reach the body where they are needed
Sunitha K, Hemshekhar M, Sebastin Santhosh M, Suresh Kumar M, Kemparaju K, Girish S, K (2011) Inhibition of hemorrhagic activity of viper venoms by N-acetyl cysteine: involvement of N-acetyl and thiol groups