—> And the best natural source of vitamin D is sunlight.
Yes.
Except when you wear sunscreen, that blocks the conversion
Except when you there is not enough seasonally available - usually when you need it most
Except when you avoid the sun
Except for those who genetically are unable to absorb less (darker skinned people)
Except for those on statin drugs that reduce the cholesterol your body needs to convert sunlight into vitamin D
Ect.
And except as you age. I've read that Vitamin D production goes down as you get older.
And except as your shadow is longer than you are tall. Another way of saying, "Except when you there is not enough seasonally available - usually when you need it most"