What's the problem with chelation therapy? I mean, okay it might not help and hypothesis may get disproven, but why not just take it? It doesn't seem to be eith

What's the problem with chelation therapy? I mean, okay it might not help and hypothesis may get disproven, but why not just take it? It doesn't seem to be either very expensive or very dangerous/have very strong side effects from what i can quickly google up?