It's an interesting hypothesis but unfortunately a cohort study with no randomized control and n=236 isn't really meaningful. There's no control at all here and the sample size is tiny.
To infer causality in an epidemiological study such as this you need very large cohorts with very specific results.
Even with huge cohorts you still have relatively indefensible results. The 7 country study is a good example: https://en.wikipedia.org/wiki/Seven_Countries_Study