Yes, if you don't go out in the sunshine and you don't eat a diet with either natural or supplemental vitamin D. Believe it or not, there are plenty of people in the situation in many countries right now, especially the UK.
In fact, most people in high northern latitudes (UK, especially Scotland) become very low in vitamin D by the end of winter, meaning that the begin the summer with a functional vitamin D deficiency. If they don't catch up and "make hay while the sun shines", or rather make vitamin D, then they will enter the next winter in an already low vitamin D state, meaning that they become even more deficient. Over time this results in bone problems like osteomalacia, which is prevalent in dark skinned people and especially those also wont to cover every square centimetre of skin for "cultural reasons"...
Thanks; but I thought that greater excitement - at least at this stage - was around the molecules that were there in what would have been this lake bed sediment. There were various organics and sulphur compounds, which would have made for fine Martian food, albeit for bacteria-sized aliens...
A gentleman phoned in to ask how the trees that you see growing along city streets and often encased by the pavement and concrete surrounds nevertheless are able to access sufficient water and nutrients.
We had quite an interesting discussion about it, but I thought I'd enquire what everyone here thinks too?
I was thinking of you yesterday and wondering how you were getting on - it's so nice to see you back and, by the sound of it, improved and improving health.
It will take time for everything to settle down, so it's important not to overdo it at too early a stage. There will be a period now while the heart muscle adapts to a different workload and remodels itself accordingly. As this happens the function will likely continue to improve, so it's early days yet.
That's a good point. A one off measure of blood sugar can be very misleading for a physician, because blood glucose is very dynamic in a diabetic and goes up and down with diet, exercise and insulin use. The HBA1c measure flushes out naughty diabetics who misbehave when they think the doctor isn't watching, because it reveals what their sugar control is like day-to-day rather than just on the day they have to see the doctor for a check-up!