Vitamin D lamps are jokes. The wavelengths that are needed to produce vitamin D in humans are blocked by the glass. I think they do more harm then good.
The link you sent me did not disprove my theory—and please don’t reference wikipedia. I know you can do much better. However, let’s say that some wavelengths could indeed get through the glass.
The problem is that nobody really knows exactly what rays humans need to make vitamin D. Also, can you find a single large-scale (I would say 1000+, but that’s a relatively low number. A real large scale study is more like 10,000+...) study that shows lamps produce significant amounts of V.D.?
and please don’t reference wikipedia. I know you can do much better.
Wikipedia is an excellent resource to reference for trivial facts. Follow the links from the wikipedia page and look at the actual sources if you really want to pretend you are too cool for wikipedia itself. (That is, the wikipedia snub is an intellectual one-upmanship move that is miscalibrated with respect to this particular social environment.)
The problem is that nobody really knows exactly what rays humans need to make vitamin D.
I don’t believe you.
Also, can you find a single large-scale (I would say 1000+, but that’s a relatively low number. A real large scale study is more like 10,000+...) study that shows lamps produce significant amounts of V.D.?
If you are going to specify a single number to represent standard of evidence for a study you ought to specify a the statistical significance required (for a given effect size). (An alternative like likelihood ratio would also work.)
Of course even then you cannot by force of will negate the fact that smaller, less conclusive studies still provide evidence. Weaker evidence but still evidence. Even a well designed study of a single individual is informative.
Vitamin D3 is made in the skin when 7-dehydrocholesterol reacts with ultraviolet light (UVB) at wavelengths between 270 and 300 nm, with peak synthesis occurring between 295 and 297 nm. These wavelengths are present in sunlight when the UV index is greater than three, as well as in the light emitted by the UV lamps in tanning beds (which produce ultraviolet primarily in the UVA spectrum, but typically produce 4% to 10% of the total UV emissions as UVB).
UV lamps in tanning beds produce UV light of the right frequency to stimulate vitamin D production. They have to, in order to do what they do.
and please don’t reference wikipedia. I know you can do much better.
A trivial Googling shows several sources claiming that tanning beds and lamps generate UVB.
The problem is that nobody really knows exactly what rays humans need to make vitamin D.
UVB light. See above.
Also, can you find a single large-scale (I would say 1000+, but that’s a relatively low number. A real large scale study is more like 10,000+...) study that shows lamps produce significant amounts of V.D.?
Reasonably large studies have been done on treating rickets, a vitamin D deficiency, with ultraviolet lamps. Unsurprisingly, it works.
Now then, what evidence do you have that 1) we don’t know what wavelengths of light stimulate vitamin D production; 2) we can’t build lamps that produce those wavelengths; and 3) that the lamps we have do more harm than good.
Consider 3) in the light of the vast advances in curing rickets since the 19th century.
It’s not that simple. My relative works in a large hospital and has given many (cancer) patients vitamin D pills, yet their levels did not increase. We think that there are probably other cofacters needed. I think more research definitely needs to be done.
She has done this for many years and have a lot of patients. In any case—even if she is wrong—pills have shown to leach calcium from people’s bones.
In the end, the best thing is simply sunlight.
Here we see the problem with the appeal-to-relative. I don’t usually go about personally insulting people’s relatives and yet simply by rejecting the superstition declared above shend’s relative’s competence is called into question.
Vitamin D supplements reduce the amount of calcium leeched from the bones (and excreted in urine) and actually increase our ability to absorb calcium from food. There is a reason a lot of calcium supplements also include vitamin D.
In the end, the best thing is simply sunlight.
For killing vampires yes, for getting vitamin D, not so much.
Vitamin D lamps are jokes. The wavelengths that are needed to produce vitamin D in humans are blocked by the glass. I think they do more harm then good.
Not entirely true.
The link you sent me did not disprove my theory—and please don’t reference wikipedia. I know you can do much better. However, let’s say that some wavelengths could indeed get through the glass. The problem is that nobody really knows exactly what rays humans need to make vitamin D. Also, can you find a single large-scale (I would say 1000+, but that’s a relatively low number. A real large scale study is more like 10,000+...) study that shows lamps produce significant amounts of V.D.?
Yes it did.
Wikipedia is an excellent resource to reference for trivial facts. Follow the links from the wikipedia page and look at the actual sources if you really want to pretend you are too cool for wikipedia itself. (That is, the wikipedia snub is an intellectual one-upmanship move that is miscalibrated with respect to this particular social environment.)
I don’t believe you.
If you are going to specify a single number to represent standard of evidence for a study you ought to specify a the statistical significance required (for a given effect size). (An alternative like likelihood ratio would also work.)
Of course even then you cannot by force of will negate the fact that smaller, less conclusive studies still provide evidence. Weaker evidence but still evidence. Even a well designed study of a single individual is informative.
See this part, emphasis mine.
UV lamps in tanning beds produce UV light of the right frequency to stimulate vitamin D production. They have to, in order to do what they do.
A trivial Googling shows several sources claiming that tanning beds and lamps generate UVB.
UVB light. See above.
Reasonably large studies have been done on treating rickets, a vitamin D deficiency, with ultraviolet lamps. Unsurprisingly, it works.
Now then, what evidence do you have that 1) we don’t know what wavelengths of light stimulate vitamin D production; 2) we can’t build lamps that produce those wavelengths; and 3) that the lamps we have do more harm than good.
Consider 3) in the light of the vast advances in curing rickets since the 19th century.
This much is true. Swallow a supplement capsule and leave your skin alone!
It’s not that simple. My relative works in a large hospital and has given many (cancer) patients vitamin D pills, yet their levels did not increase. We think that there are probably other cofacters needed. I think more research definitely needs to be done.
Have you moved from rejecting mere wikipedia references and demanding studies with 10k+ to appealing to the speculation of your relative?
She has done this for many years and have a lot of patients. In any case—even if she is wrong—pills have shown to leach calcium from people’s bones. In the end, the best thing is simply sunlight.
Here we see the problem with the appeal-to-relative. I don’t usually go about personally insulting people’s relatives and yet simply by rejecting the superstition declared above shend’s relative’s competence is called into question.
Vitamin D supplements reduce the amount of calcium leeched from the bones (and excreted in urine) and actually increase our ability to absorb calcium from food. There is a reason a lot of calcium supplements also include vitamin D.
For killing vampires yes, for getting vitamin D, not so much.
While the anecdote is interesting, cancer patients are perhaps not the best sample group for extrapolating to the healthy.