Hauer and Anderer’s ex vivo study, using human peripheral blood mononuclear cells (PBMC), demonstrated larch arabinogalactan’s ability to enhance NK cells’activity/cytotoxicity (i.e. ability to mediate spontaneous cytotoxicity against tumour cells and virus-infected cells without prior sensitisation by antigen) through a possible increase in interferon-gamma (IFN-γ) [33]. Here, IFNG is linked to neoplasm.