These data points are interesting but I'm glad you pointed out the working definition of 'healthy diet' is limited, to say the least. My diet is better than ever on keto and I eat a lot of fatty meat. Labs are better, weight is better, etc. I would love to see some data on other factors like HRV, overall sugar intake, gender but I guess they could only analyze so much. As for education level, it's a marker for income.