You can, but its not ideal for multi-use vials
BioMed Research International took a look at a number of clinical trials back in 2015 and came to the conclusion that the molecule is very safe
Drugs 81:12291233 Lehmann J, Retz M, Sidhu SS, Suttmann H, Sell M, Paulsen F, Harder J, Unteregger G, Stckle M (2006) Antitumor activity of the antimicrobial peptide magainin II against bladder cancer cell lines
Almost as effective as eating before especially with fat-rich foods
The same mechanism that helps deliver healing factors to injured tissue could theoretically support tumor growth by enhancing blood supply to cancerous cells
But they are also dose-dependent and temporary