Listen Now Download as mp3 from the show Vitamin D: Shedding light on diabetes, MS and cancer
James Veal, Facebook asked:
I'm not happy about the Scottish Government who want to fortify even more foods with their version of Vitamin D, surely we can source our own if we want it. Chemically produced Vitamin D will be no better than most of the other chemically produced products they try to force on us!” what do you think?
George - Well chemically, it’s a very simple molecule and it’s identical really to what you make in your skin, so I don't think there's any reason to think that it would be any different.
But I think the issue of supplementing the population is awkward.
Despite the fact there's a control study showing that folate prevents neural tube defects, it’s not added to the food and one can only compare what happened in America now.
I'm a Canadian, but I’d have to say, the way they dealt with this was the way it probably should’ve been done which is that they supplemented their food within a couple of years that the results coming available and they were able to show that as much as 80% of neural tube defects were prevented.
Here, I think these issues have been more controversial and just the fact that people want to put supplements then doesn’t mean that it’s bad. There are lots of examples where supplementation is very useful. Iodine and salt is a good example. No one argues about that and I think in a few years, nobody is going to be arguing about this as well.
I think this gives the game away "Chemically produced Vitamin D..."
Rickets used to be very common in Scotland (you may have noticed a distinct lack of sunshine there.)
We've had Vitamin D supplemented milk in the USA for years, as well as various vitamin supplements in breakfast cereals. It is not a bad idea to hit the general population with a little, whether or not they also choose to take daily vitamins. And, some cereals advertize supplementing 100% of everything imaginable, as part of their marketing strategy.
I'm not happy with the way we are going on this.
- FOOD: I just checked the cornflakes box, one brand has 30% of the RDA (rec daily allowance) & since I eat 5 veg a day, fish 3 times/week & meat surely I'm getting most of my vitamin D from food
damm, I forgot to say that Vitamin D is already included in most calcium supplement tablets stewgreen, Wed, 25th Jan 2012
Fruit, veg and meat have practically NO vitamin D. Hardly ANY foods have vitamin D in. Oily fish is the best, but even that isn't super high, you'd have to have it several times a week to get your D, and most people don't have it that often.
, since humans have been mostly fine for the last 20,000 years in the UK without vitamin D tablets or eating lots of oily fish (which as you say is the biggest dietary source, followed by a bit in eggs & liver). Are we really saying vegetarians don't get enough without tablets ..surely that would have shown up by now ?
that story is repeated on the NHS's own website in more detail : http://www.nhs.uk/news/2012/01January/Pages/vitamin-d-medical-advice-and-supplements.aspx stewgreen, Thu, 26th Jan 2012
the argument that we have been okay for all these years is full of false assumptions. What do you mean by fine? When people died at an early age from infectious disease, malnutrition or whatever, then the effect of lack of vitamin D on bones was not much of an issue unless you count all the people with rickets. Very few people lived long enough to get osteoporosis, and probably those that did live long enough did get it--it just wasn't diagnosed. Old people just had crumpled spines and broke their hips.
Yes coincidentally I was just about to post the same message ...when I read that NHS report I realised 90% of our supply comes from sunlight so counting the value in food is a bit of a red- herring, "We therefore rely on accumulated fat deposits of vitamin D over winter "
" humans have been mostly fine for the last 20,000 years"
One should also consider the major advancements in medicine over the last century or so.
small point - WINTER-SUN holidays - If 12 minutes per day on face and hands is sufficient in summer is there any topping up effect when people take a holiday to Canaries etc. in the winter
Uh huh. Rickets is on the increase in the UK. But you're fine, with your WINTER-SUN holidays, sod anyone that doesn't want to, or can't afford to go on one.
D is oil based vitamin & not urine flushable? CZARCAR, Fri, 2nd Mar 2012
Yup, it's fat soluble, and can't be excreted.
thanx, cholesterol + sunlight= D? CZARCAR, Fri, 2nd Mar 2012
Yes, cholesterol + UV B. It's incredibly cheap to manufacture, and seems to be very safe. wolfekeeper, Fri, 2nd Mar 2012
Possible that excess D intake results in unconverted/accumulated cholesterol? CZARCAR, Fri, 2nd Mar 2012
Not really, it's a hormone, it's present in microgram quantities, whereas normal fats are grams/kilograms. wolfekeeper, Fri, 2nd Mar 2012