Well, monensin is a inhibitor of lysyl oxidase (1). 30nm of monensin is sufficient to cut of 50 % of the activity of this enzyme. It is sufficient to worse osteoporosis , aneurysm and other pathologies. How much we eat of this substance matters.
Guilherme Carvalho da Costa
(1)Secretion of lysyl oxidase by cultured human skin fibroblasts and effects of monensin, nigericin, tunicamycin and colchicine
Helena Kuivaniemi, Leena Ala-Kokko, Kari I. Kivirikko