Vitamin D is a fat soluble vitamin isn't it, so maybe we need more than just swallowing a pill. We have very bad data from most Vitamin D studies suggesting it

Vitamin D is a fat soluble vitamin isn't it, so maybe we need more than just swallowing a pill. We have very bad data from most Vitamin D studies suggesting it does almost nothing. The people with high natural Vitamin D who spend 1-2h per day (exercising?) outside might just imply a proxy for a healthy lifestyle. Alternatively Vitamin D might need to be a) taken in higher quantities than the studies have done b) taken with fat c) taken with other supplements K2, NAC, Magnesium (which people are also deficient in) etc. We could probably come up with other theories why the trials and results don't add up. Nice to see an actually positive result from supplimentation.