> Trivial counter-example: Iceland. Iceland actually has Vitamin D deficiency levels comparable to a country such as Greece [1][2]. Supplements such as fish oi

> Trivial counter-example: Iceland. Iceland actually has Vitamin D deficiency levels comparable to a country such as Greece [1][2]. Supplements such as fish oil liver are in widespread use. [1] https://www.careacross.com/blog/are-you-getting-enough-vitamin-d#.XrxLshP0kWo https://www.careacross.com/blog/are-you-getting-enough-vitam... [2] https://academic.oup.com/ajcn/article/103/4/1033/4662891 https://academic.oup.com/ajcn/article/103/4/1033/4662891