所以我都是爭取達到維生素D3標準的下限，過20多就行了。
這篇文章引用的原文說可以低到12.5，這種東西靠調查和數據分布作出的話，可能是有問題的。
下麵專家這段話說得也很糊塗，現在人的維生素D3缺乏與什麽進化不進化的沒有啥關係，因為可能過去的人根本不缺。 近百年人類生活方式已經有了很大的改變，曬太陽的機會比較少，完全有可能一個群體中維生素D的水平普遍比較低。就我看到的亞裔人群，沒多少能到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?”
