Somehow this is news:
Women who embraced a healthy diet after being diagnosed with type 2 diabetes had significantly lower rates of all-cause and cardiovascular mortality than did those with a bad diet, in a large observational study with up to 26 years of follow-up.
So, to summarize, a healthy diet is good for you. And a bad diet is, well, bad for you. Did we not know this? And someone got funding for this?