所以我都是争取达到维生素D3标准的下限，过20多就行了。
这篇文章引用的原文说可以低到12.5，这种东西靠调查和数据分布作出的话，可能是有问题的。
下面专家这段话说得也很糊涂，现在人的维生素D3缺乏与什么进化不进化的没有啥关系，因为可能过去的人根本不缺。 近百年人类生活方式已经有了很大的改变，晒太阳的机会比较少，完全有可能一个群体中维生素D的水平普遍比较低。就我看到的亚裔人群，没多少能到20的。
（osteoporosis expert Dr. Joel Finkelstein）He points out that from an evolutionary standpoint, it doesn’t make sense that higher vitamin D levels would be beneficial to humans. “Vitamin D is actually quite hard to find in naturally occurring food sources,” he points out. “Yes, we can get vitamin D from the sun, but our bodies evolved to create darker skin in the parts of the world that get the most sun. If vitamin D is so critical to humans, why would we evolve in this way, to require something that is hard to come by, and then evolve in such a way as to make it harder to absorb?”
