You said it’s untestable but then said a Swedish hospital did a study on it? I don’t see why things can’t be tested over a long term. There are many such studies.
replySwedish hospital study was about desloratidine:
replyhttps://pubmed.ncbi.nlm.nih.gov/33550204/
Metabolic theory of cancer is untestable in practice as you can't control all variables over long time.