And vitamin D is a basis of your argument for "improvement". You now support evidence counter to your argument.
P.S. Siberia is not equatorial either.
Reject away. But until you learn something about the subject, your rejection means nothing.
Well fine since you answered me, I think in an attempt to answer my question, and failed to convince me. I told you why. Just-so stories don't hack it.
Modern groups have vitamin D fortified milk (that's the reason its there!). Groups in the far north supplement their diets with fish oils. They live too far north to get any appreciable vitamin D from the sun, and they can't expose their skin to the sun for very long anyway, lest it freeze.
Concerning vitamin D Vitamin D Deficiency Study Raises New Questions About Disease And Supplements
ScienceDaily (Jan. 27, 2008) — Low blood levels of vitamin D have long been associated with disease, and the assumption has been that vitamin D supplements may protect against disease. However, this new research demonstrates that ingested vitamin D is immunosuppressive and that low blood levels of vitamin D may be actually a result of the disease process. Supplementation may make the disease worse.
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"Our disease model has shown us why low levels of vitamin D are observed in association with major and chronic illness," Marshall added. "Vitamin D is a secosteroid hormone, and the body regulates the production of all it needs. In fact, the use of supplements can be harmful, because they suppress the immune system so that the body cannot fight disease and infection effectively."
[[Well fine since you answered me, I think in an attempt to answer my question, and failed to convince me. I told you why. Just-so stories don’t hack it.]]
Really? Because it seems the just so stories about Macroevoltuion suit you just fine
[[”Our disease model has shown us why low levels of vitamin D are observed in association with major and chronic illness,” Marshall added. “Vitamin D is a secosteroid hormone, and the body regulates the production of all it needs. In fact, the use of supplements can be harmful, because they suppress the immune system so that the body cannot fight disease and infection effectively.”]]
On the other hand manyt of the diseases caused by such things a low Vit D result in overactive imune systems which end up attackign one’s own body, so the reverse is also true, that supplimenting Vit D and the resulting suppression of the imune system is infact benificial to those sufferign the ravages of overactive imune systems