That's interesting, I was just wondering whether we get any benefit from ambient sunlight indoors. So you're saying 'yes' (a limited / very modest benefit). Bu

That's interesting, I was just wondering whether we get any benefit from ambient sunlight indoors. So you're saying 'yes' (a limited / very modest benefit). But how much sunlight do you need in order to saturate your vitamin D production? If I'm indoors in a room with a lot of windows all day, is that good enough?