causation does not equal correlation, there are various things the study does not cover, for example the people most likely to become vegan are those with healt

causation does not equal correlation, there are various things the study does not cover, for example the people most likely to become vegan are those with health issues so they become vegan to get around digestion issues, inflamation, weight gain etc.. they already have a body that is not in the best condition. then there are the opposite who are super fit and going to be doing athletics and putting themselves more at risk