> Most likely healthy people go outside more than sick people and thus get more sun exposure Such a lazy critique. Here's the actual study: https://onlinelibr

> Most likely healthy people go outside more than sick people and thus get more sun exposure Such a lazy critique. Here's the actual study: https://onlinelibrary.wiley.com/doi/10.1111/joim.12251 https://onlinelibrary.wiley.com/doi/10.1111/joim.12251 Number of subjects: 39,973 Follow up period: 20 years Some factors controlled for: smoking, history of antidiabetic meds, history of CVD meds, weight/height/BMI, level of exercise, income, alcohol consumption, N pregnancies. I think these factors pretty well correlate with "health" (however you'd measure actually that).